25489946 has 16 divisors (see below), whose sum is σ = 39470760. Its totient is φ = 12337920.

The previous prime is 25489939. The next prime is 25489969. The reversal of 25489946 is 64998452.

It can be written as a sum of positive squares in 4 ways, for example, as 9369721 + 16120225 = 3061^2 + 4015^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25489946.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 10100 + ... + 12368.

Almost surely, 2^25489946 is an apocalyptic number.

25489946 is a deficient number, since it is larger than the sum of its proper divisors (13980814).

25489946 is a wasteful number, since it uses less digits than its factorization.

25489946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449.

The product of its digits is 622080, while the sum is 47.

The square root of 25489946 is about 5048.7568766975. The cubic root of 25489946 is about 294.2995774006.

The spelling of 25489946 in words is "twenty-five million, four hundred eighty-nine thousand, nine hundred forty-six".