12465640 has 64 divisors (see below), whose sum is σ = 31389120. Its totient is φ = 4416000.

The previous prime is 12465623. The next prime is 12465671. The reversal of 12465640 is 4656421.

It is a junction number, because it is equal to n+sod(n) for n = 12465599 and 12465608.

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, 17695 + ... + 18385.

It is an arithmetic number, because the mean of its divisors is an integer number (490455).

Almost surely, 2^12465640 is an apocalyptic number.

12465640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12465640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15694560).

12465640 is an abundant number, since it is smaller than the sum of its proper divisors (18923480).

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

12465640 is a wasteful number, since it uses less digits than its factorization.

12465640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 12465640 is about 3530.6713242668. The cubic root of 12465640 is about 231.8665998851.

It can be divided in two parts, 1246 and 5640, that added together give a palindrome (6886).

The spelling of 12465640 in words is "twelve million, four hundred sixty-five thousand, six hundred forty".