261342475 has 12 divisors (see below), whose sum is σ = 326010384. Its totient is φ = 207818720.

The previous prime is 261342467. The next prime is 261342503. The reversal of 261342475 is 574243162.

It is not a de Polignac number, because 261342475 - 2³ = 261342467 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261342475.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27124 + ... + 35473.

It is an arithmetic number, because the mean of its divisors is an integer number (27167532).

Almost surely, 2^261342475 is an apocalyptic number.

261342475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

261342475 is a deficient number, since it is larger than the sum of its proper divisors (64667909).

261342475 is a wasteful number, since it uses less digits than its factorization.

261342475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62774 (or 62769 counting only the distinct ones).

The product of its digits is 40320, while the sum is 34.

The square root of 261342475 is about 16166.0902818214. The cubic root of 261342475 is about 639.3470513524.

The spelling of 261342475 in words is "two hundred sixty-one million, three hundred forty-two thousand, four hundred seventy-five".