25220929 has 2 divisors, whose sum is σ = 25220930. Its totient is φ = 25220928.

The previous prime is 25220869. The next prime is 25220941. The reversal of 25220929 is 92902252.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19228225 + 5992704 = 4385^2 + 2448^2 .

It is a cyclic number.

It is not a de Polignac number, because 25220929 - 2⁹ = 25220417 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25220929.

It is not a weakly prime, because it can be changed into another prime (25220959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12610464 + 12610465.

It is an arithmetic number, because the mean of its divisors is an integer number (12610465).

Almost surely, 2^25220929 is an apocalyptic number.

It is an amenable number.

25220929 is a deficient number, since it is larger than the sum of its proper divisors (1).

25220929 is an equidigital number, since it uses as much as digits as its factorization.

25220929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 25220929 is about 5022.0443048623. The cubic root of 25220929 is about 293.2605827102.

The spelling of 25220929 in words is "twenty-five million, two hundred twenty thousand, nine hundred twenty-nine".