25220449 has 2 divisors, whose sum is σ = 25220450. Its totient is φ = 25220448.

The previous prime is 25220431. The next prime is 25220471. The reversal of 25220449 is 94402252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24206400 + 1014049 = 4920^2 + 1007^2 .

It is a cyclic number.

It is not a de Polignac number, because 25220449 - 2⁵ = 25220417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25220479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12610224 + 12610225.

It is an arithmetic number, because the mean of its divisors is an integer number (12610225).

Almost surely, 2^25220449 is an apocalyptic number.

It is an amenable number.

25220449 is a deficient number, since it is larger than the sum of its proper divisors (1).

25220449 is an equidigital number, since it uses as much as digits as its factorization.

25220449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 25220449 is about 5021.9965153313. The cubic root of 25220449 is about 293.2587222716.

The spelling of 25220449 in words is "twenty-five million, two hundred twenty thousand, four hundred forty-nine".