261025375 has 48 divisors (see below), whose sum is σ = 365234688. Its totient is φ = 185136000.

The previous prime is 261025339. The next prime is 261025409. The reversal of 261025375 is 573520162.

It is not a de Polignac number, because 261025375 - 2¹¹ = 261023327 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1366530 + ... + 1366720.

It is an arithmetic number, because the mean of its divisors is an integer number (7609056).

Almost surely, 2^261025375 is an apocalyptic number.

261025375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

261025375 is a deficient number, since it is larger than the sum of its proper divisors (104209313).

261025375 is a wasteful number, since it uses less digits than its factorization.

261025375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 238 counting only the distinct ones).

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

The square root of 261025375 is about 16156.2797388508. The cubic root of 261025375 is about 639.0883626946.

The spelling of 261025375 in words is "two hundred sixty-one million, twenty-five thousand, three hundred seventy-five".