261032625 has 160 divisors (see below), whose sum is σ = 579870720. Its totient is φ = 114307200.

The previous prime is 261032573. The next prime is 261032627. The reversal of 261032625 is 526230162.

261032625 is a `hidden beast` number, since 2 + 6 + 1 + 0 + 32 + 625 = 666.

It is not a de Polignac number, because 261032625 - 2⁹ = 261032113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (261032627) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2055312 + ... + 2055438.

It is an arithmetic number, because the mean of its divisors is an integer number (3624192).

Almost surely, 2^261032625 is an apocalyptic number.

261032625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

261032625 is an abundant number, since it is smaller than the sum of its proper divisors (318838095).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261032625 is a wasteful number, since it uses less digits than its factorization.

261032625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 261032625 is about 16156.5041082531. The cubic root of 261032625 is about 639.0942795494.

Adding to 261032625 its reverse (526230162), we get a palindrome (787262787).

The spelling of 261032625 in words is "two hundred sixty-one million, thirty-two thousand, six hundred twenty-five".