2661264 has 30 divisors (see below), whose sum is σ = 7448246. Its totient is φ = 887040.

The previous prime is 2661251. The next prime is 2661271. The reversal of 2661264 is 4621662.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2624400 + 36864 = 1620^2 + 192^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9097 + ... + 9384.

2^2661264 is an apocalyptic number.

2661264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2661264 is an abundant number, since it is smaller than the sum of its proper divisors (4786982).

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

2661264 is a wasteful number, since it uses less digits than its factorization.

2661264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18495 (or 18486 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 2661264 is about 1631.3381010692. The cubic root of 2661264 is about 138.5785415578.

The spelling of 2661264 in words is "two million, six hundred sixty-one thousand, two hundred sixty-four".