261039275 has 12 divisors (see below), whose sum is σ = 369930192. Its totient is φ = 178998240.

The previous prime is 261039241. The next prime is 261039293. The reversal of 261039275 is 572930162.

It is not a de Polignac number, because 261039275 - 2⁶ = 261039211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

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, 745652 + ... + 746001.

It is an arithmetic number, because the mean of its divisors is an integer number (30827516).

Almost surely, 2^261039275 is an apocalyptic number.

261039275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

261039275 is a deficient number, since it is larger than the sum of its proper divisors (108890917).

261039275 is a wasteful number, since it uses less digits than its factorization.

261039275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491670 (or 1491665 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 261039275 is about 16156.7099064135. The cubic root of 261039275 is about 639.0997066371.

It can be divided in two parts, 26 and 1039275, that added together give a palindrome (1039301).

The spelling of 261039275 in words is "two hundred sixty-one million, thirty-nine thousand, two hundred seventy-five".