12312534 has 32 divisors (see below), whose sum is σ = 27143424. Its totient is φ = 3699360.

The previous prime is 12312511. The next prime is 12312557. The reversal of 12312534 is 43521321.

It is an interprime number because it is at equal distance from previous prime (12312511) and next prime (12312557).

It is a self number, because there is not a number n which added to its sum of digits gives 12312534.

It is a congruent 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, 1519 + ... + 5189.

It is an arithmetic number, because the mean of its divisors is an integer number (848232).

Almost surely, 2^12312534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12312534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13571712).

12312534 is an abundant number, since it is smaller than the sum of its proper divisors (14830890).

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

12312534 is a wasteful number, since it uses less digits than its factorization.

12312534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3732.

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

The square root of 12312534 is about 3508.9220567006. The cubic root of 12312534 is about 230.9134061968.

Adding to 12312534 its reverse (43521321), we get a palindrome (55833855).

The spelling of 12312534 in words is "twelve million, three hundred twelve thousand, five hundred thirty-four".