123861530 has 32 divisors (see below), whose sum is σ = 244644624. Its totient is φ = 44868096.

The previous prime is 123861527. The next prime is 123861547. The reversal of 123861530 is 35168321.

It can be written as a sum of positive squares in 8 ways, for example, as 43705321 + 80156209 = 6611^2 + 8953^2 .

It is a super-2 number, since 2×123861530² = 30683357227881800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123861493 and 123861502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2099 + ... + 15878.

Almost surely, 2^123861530 is an apocalyptic number.

123861530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123861530 is a deficient number, since it is larger than the sum of its proper divisors (120783094).

123861530 is a wasteful number, since it uses less digits than its factorization.

123861530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18050.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 123861530 is about 11129.3095023905. The cubic root of 123861530 is about 498.4774081344.

The spelling of 123861530 in words is "one hundred twenty-three million, eight hundred sixty-one thousand, five hundred thirty".