261332025 has 12 divisors (see below), whose sum is σ = 432069072. Its totient is φ = 139377040.

The previous prime is 261332011. The next prime is 261332039. The reversal of 261332025 is 520233162.

It is an interprime number because it is at equal distance from previous prime (261332011) and next prime (261332039).

It is not a de Polignac number, because 261332025 - 2⁹ = 261331513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261331986 and 261332004.

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, 1742139 + ... + 1742288.

It is an arithmetic number, because the mean of its divisors is an integer number (36005756).

Almost surely, 2^261332025 is an apocalyptic number.

261332025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

261332025 is a deficient number, since it is larger than the sum of its proper divisors (170737047).

261332025 is a wasteful number, since it uses less digits than its factorization.

261332025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3484440 (or 3484435 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 261332025 is about 16165.7670711909. The cubic root of 261332025 is about 639.3385296279.

Adding to 261332025 its reverse (520233162), we get a palindrome (781565187).

The spelling of 261332025 in words is "two hundred sixty-one million, three hundred thirty-two thousand, twenty-five".