25575449 has 2 divisors, whose sum is σ = 25575450. Its totient is φ = 25575448.

The previous prime is 25575437. The next prime is 25575467. The reversal of 25575449 is 94457552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13741849 + 11833600 = 3707^2 + 3440^2 .

It is a cyclic number.

It is not a de Polignac number, because 25575449 - 2²⁴ = 8798233 is a prime.

It is not a weakly prime, because it can be changed into another prime (25575469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12787724 + 12787725.

It is an arithmetic number, because the mean of its divisors is an integer number (12787725).

Almost surely, 2^25575449 is an apocalyptic number.

It is an amenable number.

25575449 is a deficient number, since it is larger than the sum of its proper divisors (1).

25575449 is an equidigital number, since it uses as much as digits as its factorization.

25575449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252000, while the sum is 41.

The square root of 25575449 is about 5057.2175155910. The cubic root of 25575449 is about 294.6282744889.

The spelling of 25575449 in words is "twenty-five million, five hundred seventy-five thousand, four hundred forty-nine".