25416261 has 20 divisors (see below), whose sum is σ = 40889772. Its totient is φ = 15640128.

The previous prime is 25416257. The next prime is 25416283. The reversal of 25416261 is 16261452.

25416261 is a `hidden beast` number, since 2 + 541 + 62 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10439361 + 14976900 = 3231^2 + 3870^2 .

It is not a de Polignac number, because 25416261 - 2² = 25416257 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25416211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11016 + ... + 13121.

Almost surely, 2^25416261 is an apocalyptic number.

It is an amenable number.

25416261 is a deficient number, since it is larger than the sum of its proper divisors (15473511).

25416261 is a wasteful number, since it uses less digits than its factorization.

25416261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24162 (or 24153 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 25416261 is about 5041.4542544786. The cubic root of 25416261 is about 294.0157217748.

The spelling of 25416261 in words is "twenty-five million, four hundred sixteen thousand, two hundred sixty-one".