25654521 has 4 divisors (see below), whose sum is σ = 34206032. Its totient is φ = 17103012.

The previous prime is 25654507. The next prime is 25654523. The reversal of 25654521 is 12545652.

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 not a de Polignac number, because 25654521 - 2⁷ = 25654393 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25654523) 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, 4275751 + ... + 4275756.

It is an arithmetic number, because the mean of its divisors is an integer number (8551508).

Almost surely, 2^25654521 is an apocalyptic number.

It is an amenable number.

25654521 is a deficient number, since it is larger than the sum of its proper divisors (8551511).

25654521 is an equidigital number, since it uses as much as digits as its factorization.

25654521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8551510.

The product of its digits is 12000, while the sum is 30.

The square root of 25654521 is about 5065.0292200539. The cubic root of 25654521 is about 294.9315976616.

The spelling of 25654521 in words is "twenty-five million, six hundred fifty-four thousand, five hundred twenty-one".