261037925 has 24 divisors (see below), whose sum is σ = 338954496. Its totient is φ = 199045440.

The previous prime is 261037919. The next prime is 261037927. The reversal of 261037925 is 529730162.

It is not a de Polignac number, because 261037925 - 2¹⁰ = 261036901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261037927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 210407 + ... + 211643.

It is an arithmetic number, because the mean of its divisors is an integer number (14123104).

Almost surely, 2^261037925 is an apocalyptic number.

261037925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

261037925 is a deficient number, since it is larger than the sum of its proper divisors (77916571).

261037925 is a wasteful number, since it uses less digits than its factorization.

261037925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637 (or 1632 counting only the distinct ones).

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

The square root of 261037925 is about 16156.6681280516. The cubic root of 261037925 is about 639.0986049050.

The spelling of 261037925 in words is "two hundred sixty-one million, thirty-seven thousand, nine hundred twenty-five".