25478073 has 6 divisors (see below), whose sum is σ = 36801674. Its totient is φ = 16985376.

The previous prime is 25478051. The next prime is 25478077. The reversal of 25478073 is 37087452.

It can be written as a sum of positive squares in only one way, i.e., 24920064 + 558009 = 4992^2 + 747^2 .

It is not a de Polignac number, because 25478073 - 2⁶ = 25478009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25478077) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1415440 + ... + 1415457.

Almost surely, 2^25478073 is an apocalyptic number.

It is an amenable number.

25478073 is a deficient number, since it is larger than the sum of its proper divisors (11323601).

25478073 is a wasteful number, since it uses less digits than its factorization.

25478073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2830903 (or 2830900 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 25478073 is about 5047.5809057409. The cubic root of 25478073 is about 294.2538762243.

The spelling of 25478073 in words is "twenty-five million, four hundred seventy-eight thousand, seventy-three".