25419649 has 2 divisors, whose sum is σ = 25419650. Its totient is φ = 25419648.

The previous prime is 25419643. The next prime is 25419671. The reversal of 25419649 is 94691452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16056049 + 9363600 = 4007^2 + 3060^2 .

It is a cyclic number.

It is not a de Polignac number, because 25419649 - 2¹³ = 25411457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25419643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12709824 + 12709825.

It is an arithmetic number, because the mean of its divisors is an integer number (12709825).

Almost surely, 2^25419649 is an apocalyptic number.

It is an amenable number.

25419649 is a deficient number, since it is larger than the sum of its proper divisors (1).

25419649 is an equidigital number, since it uses as much as digits as its factorization.

25419649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 40.

The square root of 25419649 is about 5041.7902574383. The cubic root of 25419649 is about 294.0287853408.

The spelling of 25419649 in words is "twenty-five million, four hundred nineteen thousand, six hundred forty-nine".