1317904 has 45 divisors (see below), whose sum is σ = 3044541. Its totient is φ = 551040.

The previous prime is 1317887. The next prime is 1317917. The reversal of 1317904 is 4097131.

1317904 = T₂₀₇ + T₂₀₈ + ... + T₂₅₅.

The square root of 1317904 is 1148.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 63504 + 1254400 = 252^2 + 1120^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 32124 + ... + 32164.

2^1317904 is an apocalyptic number.

1317904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1317904 is the 1148-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1317904

1317904 is an abundant number, since it is smaller than the sum of its proper divisors (1726637).

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

1317904 is an equidigital number, since it uses as much as digits as its factorization.

1317904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The cubic root of 1317904 is about 109.6380389035.

Multiplying 1317904 by its sum of digits (25), we get a square (32947600 = 5740²).

The spelling of 1317904 in words is "one million, three hundred seventeen thousand, nine hundred four".