1317640 has 16 divisors (see below), whose sum is σ = 2964780. Its totient is φ = 527040.

The previous prime is 1317629. The next prime is 1317671. The reversal of 1317640 is 467131.

It can be written as a sum of positive squares in 2 ways, for example, as 1285956 + 31684 = 1134^2 + 178^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16431 + ... + 16510.

2^1317640 is an apocalyptic number.

1317640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1317640 is an abundant number, since it is smaller than the sum of its proper divisors (1647140).

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

1317640 is a wasteful number, since it uses less digits than its factorization.

1317640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32952 (or 32948 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 1317640 is about 1147.8850116628. The cubic root of 1317640 is about 109.6307175874.

The spelling of 1317640 in words is "one million, three hundred seventeen thousand, six hundred forty".