25479049 has 2 divisors, whose sum is σ = 25479050. Its totient is φ = 25479048.

The previous prime is 25479037. The next prime is 25479067. The reversal of 25479049 is 94097452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23941449 + 1537600 = 4893^2 + 1240^2 .

It is a cyclic number.

It is not a de Polignac number, because 25479049 - 2⁵ = 25479017 is a prime.

It is not a weakly prime, because it can be changed into another prime (25479079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12739524 + 12739525.

It is an arithmetic number, because the mean of its divisors is an integer number (12739525).

Almost surely, 2^25479049 is an apocalyptic number.

It is an amenable number.

25479049 is a deficient number, since it is larger than the sum of its proper divisors (1).

25479049 is an equidigital number, since it uses as much as digits as its factorization.

25479049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 25479049 is about 5047.6775847909. The cubic root of 25479049 is about 294.2576335482.

The spelling of 25479049 in words is "twenty-five million, four hundred seventy-nine thousand, forty-nine".