25058821 has 2 divisors, whose sum is σ = 25058822. Its totient is φ = 25058820.

The previous prime is 25058797. The next prime is 25058837. The reversal of 25058821 is 12885052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24117921 + 940900 = 4911^2 + 970^2 .

It is a cyclic number.

It is not a de Polignac number, because 25058821 - 2¹³ = 25050629 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25058021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12529410 + 12529411.

It is an arithmetic number, because the mean of its divisors is an integer number (12529411).

Almost surely, 2^25058821 is an apocalyptic number.

It is an amenable number.

25058821 is a deficient number, since it is larger than the sum of its proper divisors (1).

25058821 is an equidigital number, since it uses as much as digits as its factorization.

25058821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 25058821 is about 5005.8786441543. The cubic root of 25058821 is about 292.6309190643.

The spelling of 25058821 in words is "twenty-five million, fifty-eight thousand, eight hundred twenty-one".