261264460 has 12 divisors (see below), whose sum is σ = 548655408. Its totient is φ = 104505776.

The previous prime is 261264457. The next prime is 261264469. The reversal of 261264460 is 64462162.

It is not an unprimeable number, because it can be changed into a prime (261264469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6531592 + ... + 6531631.

It is an arithmetic number, because the mean of its divisors is an integer number (45721284).

Almost surely, 2^261264460 is an apocalyptic number.

261264460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261264460 is an abundant number, since it is smaller than the sum of its proper divisors (287390948).

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

261264460 is a wasteful number, since it uses less digits than its factorization.

261264460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13063232 (or 13063230 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 261264460 is about 16163.6771806418. The cubic root of 261264460 is about 639.2834265064.

The spelling of 261264460 in words is "two hundred sixty-one million, two hundred sixty-four thousand, four hundred sixty".