261422264 has 16 divisors (see below), whose sum is σ = 490354800. Its totient is φ = 130660992.

The previous prime is 261422257. The next prime is 261422267. The reversal of 261422264 is 462224162.

It is a super-2 number, since 2×261422264² = 136683200229771392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261422267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25157 + ... + 33995.

It is an arithmetic number, because the mean of its divisors is an integer number (30647175).

Almost surely, 2^261422264 is an apocalyptic number.

It is an amenable number.

261422264 is a deficient number, since it is larger than the sum of its proper divisors (228932536).

261422264 is a wasteful number, since it uses less digits than its factorization.

261422264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12542 (or 12538 counting only the distinct ones).

The product of its digits is 9216, while the sum is 29.

The square root of 261422264 is about 16168.5578825076. The cubic root of 261422264 is about 639.4121098818.

The spelling of 261422264 in words is "two hundred sixty-one million, four hundred twenty-two thousand, two hundred sixty-four".