1315391 has 12 divisors (see below), whose sum is σ = 1653456. Its totient is φ = 1024320.

The previous prime is 1315373. The next prime is 1315397. The reversal of 1315391 is 1935131.

1315391 = T₁₄₅ + T₁₄₆ + ... + T₂₂₁.

It is not a de Polignac number, because 1315391 - 2¹⁴ = 1299007 is a prime.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71 + ... + 1623.

It is an arithmetic number, because the mean of its divisors is an integer number (137788).

2^1315391 is an apocalyptic number.

1315391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1315391 is a deficient number, since it is larger than the sum of its proper divisors (338065).

1315391 is a wasteful number, since it uses less digits than its factorization.

1315391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582 (or 1571 counting only the distinct ones).

The product of its digits is 405, while the sum is 23.

The square root of 1315391 is about 1146.9049655486. The cubic root of 1315391 is about 109.5683080532.

The spelling of 1315391 in words is "one million, three hundred fifteen thousand, three hundred ninety-one".