25354561 has 4 divisors (see below), whose sum is σ = 25522624. Its totient is φ = 25186500.

The previous prime is 25354547. The next prime is 25354577. The reversal of 25354561 is 16545352.

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 25354561 - 2⁵ = 25354529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25357561) 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, 83805 + ... + 84106.

It is an arithmetic number, because the mean of its divisors is an integer number (6380656).

Almost surely, 2^25354561 is an apocalyptic number.

It is an amenable number.

25354561 is a deficient number, since it is larger than the sum of its proper divisors (168063).

25354561 is a wasteful number, since it uses less digits than its factorization.

25354561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168062.

The product of its digits is 18000, while the sum is 31.

The square root of 25354561 is about 5035.3312701351. The cubic root of 25354561 is about 293.7776134597. Note that the first 3 decimals are identical.

The spelling of 25354561 in words is "twenty-five million, three hundred fifty-four thousand, five hundred sixty-one".