1311870 has 32 divisors (see below), whose sum is σ = 3598848. Its totient is φ = 299808.

The previous prime is 1311857. The next prime is 1311899. The reversal of 1311870 is 781131.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2914 + ... + 3333.

It is an arithmetic number, because the mean of its divisors is an integer number (112464).

2^1311870 is an apocalyptic number.

1311870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311870 is an abundant number, since it is smaller than the sum of its proper divisors (2286978).

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

1311870 is a wasteful number, since it uses less digits than its factorization.

1311870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6264.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 1311870 is about 1145.3689361948. The cubic root of 1311870 is about 109.4704576170.

The spelling of 1311870 in words is "one million, three hundred eleven thousand, eight hundred seventy".