261532075 has 24 divisors (see below), whose sum is σ = 374118912. Its totient is φ = 177647520.

The previous prime is 261532069. The next prime is 261532081. The reversal of 261532075 is 570235162.

It is an interprime number because it is at equal distance from previous prime (261532069) and next prime (261532081).

It is not a de Polignac number, because 261532075 - 2²⁵ = 227977643 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 11742 + ... + 25708.

It is an arithmetic number, because the mean of its divisors is an integer number (15588288).

Almost surely, 2^261532075 is an apocalyptic number.

261532075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

261532075 is a deficient number, since it is larger than the sum of its proper divisors (112586837).

261532075 is a wasteful number, since it uses less digits than its factorization.

261532075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14091 (or 14086 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 261532075 is about 16171.9533452209. The cubic root of 261532075 is about 639.5016261727.

The spelling of 261532075 in words is "two hundred sixty-one million, five hundred thirty-two thousand, seventy-five".