25346981 has 4 divisors (see below), whose sum is σ = 27651264. Its totient is φ = 23042700.

The previous prime is 25346963. The next prime is 25347013. The reversal of 25346981 is 18964352.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-25346981 is a prime.

It is a super-2 number, since 2×25346981² = 1284938891628722, 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 (25346921) 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 3 ways as a sum of consecutive naturals, for example, 1152125 + ... + 1152146.

It is an arithmetic number, because the mean of its divisors is an integer number (6912816).

Almost surely, 2^25346981 is an apocalyptic number.

It is an amenable number.

25346981 is a deficient number, since it is larger than the sum of its proper divisors (2304283).

25346981 is a wasteful number, since it uses less digits than its factorization.

25346981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304282.

The product of its digits is 51840, while the sum is 38.

The square root of 25346981 is about 5034.5785325090. The cubic root of 25346981 is about 293.7483346216.

The spelling of 25346981 in words is "twenty-five million, three hundred forty-six thousand, nine hundred eighty-one".