25511461 has 4 divisors (see below), whose sum is σ = 25818912. Its totient is φ = 25204012.

The previous prime is 25511449. The next prime is 25511467. The reversal of 25511461 is 16411552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25511461 - 2⁵ = 25511429 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 (25511467) 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, 153601 + ... + 153766.

It is an arithmetic number, because the mean of its divisors is an integer number (6454728).

Almost surely, 2^25511461 is an apocalyptic number.

It is an amenable number.

25511461 is a deficient number, since it is larger than the sum of its proper divisors (307451).

25511461 is an equidigital number, since it uses as much as digits as its factorization.

25511461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307450.

The product of its digits is 1200, while the sum is 25.

The square root of 25511461 is about 5050.8871497985. The cubic root of 25511461 is about 294.3823561134.

Subtracting from 25511461 its reverse (16411552), we obtain a palindrome (9099909).

The spelling of 25511461 in words is "twenty-five million, five hundred eleven thousand, four hundred sixty-one".