123412521402 has 32 divisors (see below), whose sum is σ = 274274703360. Its totient is φ = 41133808800.

The previous prime is 123412521319. The next prime is 123412521497. The reversal of 123412521402 is 204125214321.

123412521402 is a `hidden beast` number, since 1 + 2 + 3 + 4 + 1 + 252 + 1 + 402 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 540423 + ... + 734085.

It is an arithmetic number, because the mean of its divisors is an integer number (8571084480).

Almost surely, 2^123412521402 is an apocalyptic number.

123412521402 is an abundant number, since it is smaller than the sum of its proper divisors (150862181958).

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

123412521402 is a wasteful number, since it uses less digits than its factorization.

123412521402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205475 (or 205469 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 123412521402 its reverse (204125214321), we get a palindrome (327537735723).

The spelling of 123412521402 in words is "one hundred twenty-three billion, four hundred twelve million, five hundred twenty-one thousand, four hundred two".