25520461 has 4 divisors (see below), whose sum is σ = 25531612. Its totient is φ = 25509312.

The previous prime is 25520437. The next prime is 25520479. The reversal of 25520461 is 16402552.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 15848361 + 9672100 = 3981^2 + 3110^2 .

It is a cyclic number.

It is not a de Polignac number, because 25520461 - 2⁷ = 25520333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25523461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750 + ... + 7183.

It is an arithmetic number, because the mean of its divisors is an integer number (6382903).

Almost surely, 2^25520461 is an apocalyptic number.

It is an amenable number.

25520461 is a deficient number, since it is larger than the sum of its proper divisors (11151).

25520461 is an equidigital number, since it uses as much as digits as its factorization.

25520461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11150.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 25520461 is about 5051.7780038319. The cubic root of 25520461 is about 294.4169697028.

The spelling of 25520461 in words is "twenty-five million, five hundred twenty thousand, four hundred sixty-one".