12640485 has 64 divisors (see below), whose sum is σ = 24385536. Its totient is φ = 5510400.

The previous prime is 12640477. The next prime is 12640489. The reversal of 12640485 is 58404621.

It is not a de Polignac number, because 12640485 - 2³ = 12640477 is a prime.

It is a super-2 number, since 2×12640485² = 319563722070450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640489) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 152254 + ... + 152336.

It is an arithmetic number, because the mean of its divisors is an integer number (381024).

Almost surely, 2^12640485 is an apocalyptic number.

12640485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12640485 is a deficient number, since it is larger than the sum of its proper divisors (11745051).

12640485 is a wasteful number, since it uses less digits than its factorization.

12640485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 12640485 is about 3555.3459747259. The cubic root of 12640485 is about 232.9456362205.

The spelling of 12640485 in words is "twelve million, six hundred forty thousand, four hundred eighty-five".