12315432 has 32 divisors (see below), whose sum is σ = 31783680. Its totient is φ = 3972480.

The previous prime is 12315427. The next prime is 12315449. The reversal of 12315432 is 23451321.

It is a junction number, because it is equal to n+sod(n) for n = 12315399 and 12315408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7533 + ... + 9020.

It is an arithmetic number, because the mean of its divisors is an integer number (993240).

Almost surely, 2^12315432 is an apocalyptic number.

12315432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12315432 is an abundant number, since it is smaller than the sum of its proper divisors (19468248).

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

12315432 is a wasteful number, since it uses less digits than its factorization.

12315432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16593 (or 16589 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 12315432 is about 3509.3349797362. The cubic root of 12315432 is about 230.9315214647.

Adding to 12315432 its reverse (23451321), we get a palindrome (35766753).

The spelling of 12315432 in words is "twelve million, three hundred fifteen thousand, four hundred thirty-two".