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125820018 = 2326990001
BaseRepresentation
bin1110111111111…
…01110001110010
322202202022121200
413133331301302
5224202220033
620252432030
73055311132
oct737756162
9282668550
10125820018
1165027495
1236178616
13200b401c
14129d2ac2
15b0a5013
hex77fdc72

125820018 has 12 divisors (see below), whose sum is σ = 272610078. Its totient is φ = 41940000.

The previous prime is 125820007. The next prime is 125820029. The reversal of 125820018 is 810028521.

It is an interprime number because it is at equal distance from previous prime (125820007) and next prime (125820029).

It can be written as a sum of positive squares in only one way, i.e., 109683729 + 16136289 = 10473^2 + 4017^2 .

It is a junction number, because it is equal to n+sod(n) for n = 125819973 and 125820000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3494983 + ... + 3495018.

Almost surely, 2125820018 is an apocalyptic number.

125820018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

125820018 is an abundant number, since it is smaller than the sum of its proper divisors (146790060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125820018 is a wasteful number, since it uses less digits than its factorization.

125820018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6990009 (or 6990006 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 125820018 is about 11216.9522598610. The cubic root of 125820018 is about 501.0909751484.

Adding to 125820018 its reverse (810028521), we get a palindrome (935848539).

The spelling of 125820018 in words is "one hundred twenty-five million, eight hundred twenty thousand, eighteen".

Divisors: 1 2 3 6 9 18 6990001 13980002 20970003 41940006 62910009 125820018