261371460 has 48 divisors (see below), whose sum is σ = 836390016. Its totient is φ = 59741952.

The previous prime is 261371459. The next prime is 261371483. The reversal of 261371460 is 64173162.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 310737 + ... + 311576.

It is an arithmetic number, because the mean of its divisors is an integer number (17424792).

Almost surely, 2^261371460 is an apocalyptic number.

261371460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261371460 is an abundant number, since it is smaller than the sum of its proper divisors (575018556).

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

261371460 is a wasteful number, since it uses less digits than its factorization.

261371460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622332 (or 622330 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 261371460 is about 16166.9867322269. The cubic root of 261371460 is about 639.3706867364.

The spelling of 261371460 in words is "two hundred sixty-one million, three hundred seventy-one thousand, four hundred sixty".