261254025 has 48 divisors (see below), whose sum is σ = 491149120. Its totient is φ = 136080000.

The previous prime is 261254023. The next prime is 261254051. The reversal of 261254025 is 520452162.

261254025 is a `hidden beast` number, since 2 + 612 + 5 + 40 + 2 + 5 = 666.

It is not a de Polignac number, because 261254025 - 2¹ = 261254023 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 261254025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261254023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24525 + ... + 33525.

Almost surely, 2^261254025 is an apocalyptic number.

261254025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

261254025 is a deficient number, since it is larger than the sum of its proper divisors (229895095).

261254025 is a wasteful number, since it uses less digits than its factorization.

261254025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9063 (or 9052 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 261254025 is about 16163.3543857703. The cubic root of 261254025 is about 639.2749153202.

The spelling of 261254025 in words is "two hundred sixty-one million, two hundred fifty-four thousand, twenty-five".