1025664 has 32 divisors (see below), whose sum is σ = 2725440. Its totient is φ = 341760.

The previous prime is 1025659. The next prime is 1025669. The reversal of 1025664 is 4665201.

It is an interprime number because it is at equal distance from previous prime (1025659) and next prime (1025669).

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1025669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 952 + ... + 1719.

It is an arithmetic number, because the mean of its divisors is an integer number (85170).

2^1025664 is an apocalyptic number.

It is an amenable number.

1025664 is an abundant number, since it is smaller than the sum of its proper divisors (1699776).

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

1025664 is an equidigital number, since it uses as much as digits as its factorization.

1025664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2688 (or 2676 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1025664 is about 1012.7507097011. The cubic root of 1025664 is about 100.8482510239.

The spelling of 1025664 in words is "one million, twenty-five thousand, six hundred sixty-four".