25063981 has 4 divisors (see below), whose sum is σ = 25079200. Its totient is φ = 25048764.

The previous prime is 25063979. The next prime is 25063993. The reversal of 25063981 is 18936052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25063981 - 2¹ = 25063979 is a prime.

It is a super-2 number, since 2×25063981² = 1256406287136722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25063921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4791 + ... + 8548.

It is an arithmetic number, because the mean of its divisors is an integer number (6269800).

Almost surely, 2^25063981 is an apocalyptic number.

It is an amenable number.

25063981 is a deficient number, since it is larger than the sum of its proper divisors (15219).

25063981 is a wasteful number, since it uses less digits than its factorization.

25063981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15218.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 25063981 is about 5006.3940116615. The cubic root of 25063981 is about 292.6510034345.

The spelling of 25063981 in words is "twenty-five million, sixty-three thousand, nine hundred eighty-one".