1315721474 has 16 divisors (see below), whose sum is σ = 2043835200. Its totient is φ = 634491984.

The previous prime is 1315721467. The next prime is 1315721513. The reversal of 1315721474 is 4741275131.

It is a super-2 number, since 2×1315721474² = 3462245994289465352, which contains 22 as substring.

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, 44357 + ... + 67815.

It is an arithmetic number, because the mean of its divisors is an integer number (127739700).

Almost surely, 2^1315721474 is an apocalyptic number.

1315721474 is a deficient number, since it is larger than the sum of its proper divisors (728113726).

1315721474 is a wasteful number, since it uses less digits than its factorization.

1315721474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24457.

The product of its digits is 23520, while the sum is 35.

The square root of 1315721474 is about 36272.8751824280. The cubic root of 1315721474 is about 1095.7748313117.

The spelling of 1315721474 in words is "one billion, three hundred fifteen million, seven hundred twenty-one thousand, four hundred seventy-four".