25479961 has 6 divisors (see below), whose sum is σ = 27590910. Its totient is φ = 23519808.

The previous prime is 25479953. The next prime is 25479967. The reversal of 25479961 is 16997452.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3097600 + 22382361 = 1760^2 + 4731^2 .

It is not a de Polignac number, because 25479961 - 2³ = 25479953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25479967) 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 in 5 ways as a sum of consecutive naturals, for example, 75216 + ... + 75553.

It is an arithmetic number, because the mean of its divisors is an integer number (4598485).

Almost surely, 2^25479961 is an apocalyptic number.

It is an amenable number.

25479961 is a deficient number, since it is larger than the sum of its proper divisors (2110949).

25479961 is a wasteful number, since it uses less digits than its factorization.

25479961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150795 (or 150782 counting only the distinct ones).

The product of its digits is 136080, while the sum is 43.

The square root of 25479961 is about 5047.7679225575. The cubic root of 25479961 is about 294.2611444034.

The spelling of 25479961 in words is "twenty-five million, four hundred seventy-nine thousand, nine hundred sixty-one".