12638465 has 16 divisors (see below), whose sum is σ = 17411328. Its totient is φ = 8627136.

The previous prime is 12638453. The next prime is 12638471. The reversal of 12638465 is 56483621.

It is not a de Polignac number, because 12638465 - 2¹⁸ = 12376321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

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, 8519 + ... + 9891.

It is an arithmetic number, because the mean of its divisors is an integer number (1088208).

Almost surely, 2^12638465 is an apocalyptic number.

It is an amenable number.

12638465 is a deficient number, since it is larger than the sum of its proper divisors (4772863).

12638465 is a wasteful number, since it uses less digits than its factorization.

12638465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648.

The product of its digits is 34560, while the sum is 35.

The square root of 12638465 is about 3555.0618841309. The cubic root of 12638465 is about 232.9332270117.

The spelling of 12638465 in words is "twelve million, six hundred thirty-eight thousand, four hundred sixty-five".