1631264 has 24 divisors (see below), whose sum is σ = 3381840. Its totient is φ = 772416.

The previous prime is 1631263. The next prime is 1631297. The reversal of 1631264 is 4621361.

It is a happy number.

It is a super-2 number, since 2×1631264² = 5322044475392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1631261) by changing a digit.

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, 734 + ... + 1949.

It is an arithmetic number, because the mean of its divisors is an integer number (140910).

2^1631264 is an apocalyptic number.

It is an amenable number.

1631264 is an abundant number, since it is smaller than the sum of its proper divisors (1750576).

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

1631264 is a wasteful number, since it uses less digits than its factorization.

1631264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712 (or 2704 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 1631264 is about 1277.2094581548. The cubic root of 1631264 is about 117.7176049049.

The spelling of 1631264 in words is "one million, six hundred thirty-one thousand, two hundred sixty-four".