25119649 has 2 divisors, whose sum is σ = 25119650. Its totient is φ = 25119648.

The previous prime is 25119631. The next prime is 25119673. The reversal of 25119649 is 94691152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21344400 + 3775249 = 4620^2 + 1943^2 .

It is a cyclic number.

It is not a de Polignac number, because 25119649 - 2⁹ = 25119137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25116649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12559824 + 12559825.

It is an arithmetic number, because the mean of its divisors is an integer number (12559825).

Almost surely, 2^25119649 is an apocalyptic number.

It is an amenable number.

25119649 is a deficient number, since it is larger than the sum of its proper divisors (1).

25119649 is an equidigital number, since it uses as much as digits as its factorization.

25119649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 37.

The square root of 25119649 is about 5011.9506182723. The cubic root of 25119649 is about 292.8675060155.

It can be divided in two parts, 251 and 19649, that added together give a triangular number (19900 = T₁₉₉).

The spelling of 25119649 in words is "twenty-five million, one hundred nineteen thousand, six hundred forty-nine".