651264 has 52 divisors (see below), whose sum is σ = 1769256. Its totient is φ = 212992.

The previous prime is 651257. The next prime is 651271. The reversal of 651264 is 462156.

It is an interprime number because it is at equal distance from previous prime (651257) and next prime (651271).

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

Its product of digits (1440) is a multiple of the sum of its prime factors (80).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 651264.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12262 + ... + 12314.

2⁶⁵¹²⁶⁴ is an apocalyptic number.

651264 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (884628).

651264 is an abundant number, since it is smaller than the sum of its proper divisors (1117992).

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

651264 is an equidigital number, since it uses as much as digits as its factorization.

651264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80 (or 58 counting only the distinct ones).

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

The square root of 651264 is about 807.0092936268. The cubic root of 651264 is about 86.6800242396.

The spelling of 651264 in words is "six hundred fifty-one thousand, two hundred sixty-four".