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131073125 = 54209717
BaseRepresentation
bin1111101000000…
…00010001100101
3100010122012112012
413310000101211
5232023320000
621001204005
73151050251
oct764002145
9303565465
10131073125
1167a951a7
1237a90605
1321203081
141359d261
15b791735
hex7d00465

131073125 has 10 divisors (see below), whose sum is σ = 163789758. Its totient is φ = 104858000.

The previous prime is 131073121. The next prime is 131073139. The reversal of 131073125 is 521370131.

It can be written as a sum of positive squares in 5 ways, for example, as 60949249 + 70123876 = 7807^2 + 8374^2 .

It is not a de Polignac number, because 131073125 - 22 = 131073121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131073125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131073121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 104234 + ... + 105483.

Almost surely, 2131073125 is an apocalyptic number.

It is an amenable number.

131073125 is a deficient number, since it is larger than the sum of its proper divisors (32716633).

131073125 is an frugal number, since it uses more digits than its factorization.

131073125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209737 (or 209722 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 131073125 is about 11448.7171770465. The cubic root of 131073125 is about 507.9697899347.

The spelling of 131073125 in words is "one hundred thirty-one million, seventy-three thousand, one hundred twenty-five".

Divisors: 1 5 25 125 625 209717 1048585 5242925 26214625 131073125