261051374 has 24 divisors (see below), whose sum is σ = 414652968. Its totient is φ = 123243120.

The previous prime is 261051331. The next prime is 261051383. The reversal of 261051374 is 473150162.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 394604 + ... + 395264.

It is an arithmetic number, because the mean of its divisors is an integer number (17277207).

Almost surely, 2^261051374 is an apocalyptic number.

261051374 is a deficient number, since it is larger than the sum of its proper divisors (153601594).

261051374 is a wasteful number, since it uses less digits than its factorization.

261051374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248 (or 1229 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 261051374 is about 16157.0843285538. The cubic root of 261051374 is about 639.1095804360.

The spelling of 261051374 in words is "two hundred sixty-one million, fifty-one thousand, three hundred seventy-four".