12315722 has 4 divisors (see below), whose sum is σ = 18473586. Its totient is φ = 6157860.

The previous prime is 12315713. The next prime is 12315727. The reversal of 12315722 is 22751321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6405961 + 5909761 = 2531^2 + 2431^2 .

It is not an unprimeable number, because it can be changed into a prime (12315727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3078929 + ... + 3078932.

Almost surely, 2^12315722 is an apocalyptic number.

12315722 is a deficient number, since it is larger than the sum of its proper divisors (6157864).

12315722 is an equidigital number, since it uses as much as digits as its factorization.

12315722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6157863.

The product of its digits is 840, while the sum is 23.

The square root of 12315722 is about 3509.3762978626. The cubic root of 12315722 is about 230.9333340852.

The spelling of 12315722 in words is "twelve million, three hundred fifteen thousand, seven hundred twenty-two".