1317551 has 12 divisors (see below), whose sum is σ = 1444128. Its totient is φ = 1201152.

The previous prime is 1317541. The next prime is 1317553. The reversal of 1317551 is 1557131.

It is not a de Polignac number, because 1317551 - 2⁶ = 1317487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13535 + ... + 13631.

It is an arithmetic number, because the mean of its divisors is an integer number (120344).

2^1317551 is an apocalyptic number.

1317551 is a deficient number, since it is larger than the sum of its proper divisors (126577).

1317551 is an equidigital number, since it uses as much as digits as its factorization.

1317551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 161 counting only the distinct ones).

The product of its digits is 525, while the sum is 23.

The square root of 1317551 is about 1147.8462440588. The cubic root of 1317551 is about 109.6282491961.

The spelling of 1317551 in words is "one million, three hundred seventeen thousand, five hundred fifty-one".