123406465 has 32 divisors (see below), whose sum is σ = 185391360. Its totient is φ = 76771584.

The previous prime is 123406457. The next prime is 123406469. The reversal of 123406465 is 564604321.

It is a cyclic number.

It is not a de Polignac number, because 123406465 - 2³ = 123406457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123406469) 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 31 ways as a sum of consecutive naturals, for example, 24547 + ... + 29143.

It is an arithmetic number, because the mean of its divisors is an integer number (5793480).

Almost surely, 2^123406465 is an apocalyptic number.

It is an amenable number.

123406465 is a deficient number, since it is larger than the sum of its proper divisors (61984895).

123406465 is a wasteful number, since it uses less digits than its factorization.

123406465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4681.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 123406465 is about 11108.8462497237. The cubic root of 123406465 is about 497.8661933591.

The spelling of 123406465 in words is "one hundred twenty-three million, four hundred six thousand, four hundred sixty-five".