25117028 has 6 divisors (see below), whose sum is σ = 43954806. Its totient is φ = 12558512.

The previous prime is 25117021. The next prime is 25117039. The reversal of 25117028 is 82071152.

It can be written as a sum of positive squares in only one way, i.e., 15618304 + 9498724 = 3952^2 + 3082^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25116988 and 25117006.

It is not an unprimeable number, because it can be changed into a prime (25117021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3139625 + ... + 3139632.

It is an arithmetic number, because the mean of its divisors is an integer number (7325801).

Almost surely, 2^25117028 is an apocalyptic number.

It is an amenable number.

25117028 is a deficient number, since it is larger than the sum of its proper divisors (18837778).

25117028 is a wasteful number, since it uses less digits than its factorization.

25117028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6279261 (or 6279259 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 25117028 is about 5011.6891364090. The cubic root of 25117028 is about 292.8573196679.

The spelling of 25117028 in words is "twenty-five million, one hundred seventeen thousand, twenty-eight".