123402040225 has 12 divisors (see below), whose sum is σ = 157954612480. Its totient is φ = 95537062800.

The previous prime is 123402040187. The next prime is 123402040241. The reversal of 123402040225 is 522040204321.

It is not a de Polignac number, because 123402040225 - 2¹⁷ = 123401909153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 123402040225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79613445 + ... + 79614994.

Almost surely, 2^123402040225 is an apocalyptic number.

It is an amenable number.

123402040225 is a deficient number, since it is larger than the sum of its proper divisors (34552572255).

123402040225 is a wasteful number, since it uses less digits than its factorization.

123402040225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159228480 (or 159228475 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 123402040225 its reverse (522040204321), we get a palindrome (645442244546).

The spelling of 123402040225 in words is "one hundred twenty-three billion, four hundred two million, forty thousand, two hundred twenty-five".