25780954 has 4 divisors (see below), whose sum is σ = 38671434. Its totient is φ = 12890476.

The previous prime is 25780943. The next prime is 25780961. The reversal of 25780954 is 45908752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20839225 + 4941729 = 4565^2 + 2223^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6445237 + ... + 6445240.

Almost surely, 2^25780954 is an apocalyptic number.

25780954 is a deficient number, since it is larger than the sum of its proper divisors (12890480).

25780954 is a wasteful number, since it uses less digits than its factorization.

25780954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12890479.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 25780954 is about 5077.4948547487. The cubic root of 25780954 is about 295.4153070330.

The spelling of 25780954 in words is "twenty-five million, seven hundred eighty thousand, nine hundred fifty-four".