25214681 has 4 divisors (see below), whose sum is σ = 25235364. Its totient is φ = 25194000.

The previous prime is 25214669. The next prime is 25214699. The reversal of 25214681 is 18641252.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7075600 + 18139081 = 2660^2 + 4259^2 .

It is a cyclic number.

It is not a de Polignac number, because 25214681 - 2⁶ = 25214617 is a prime.

It is a super-2 number, since 2×25214681² = 1271560275863522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25214381) 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 in 3 ways as a sum of consecutive naturals, for example, 8390 + ... + 10991.

It is an arithmetic number, because the mean of its divisors is an integer number (6308841).

Almost surely, 2^25214681 is an apocalyptic number.

It is an amenable number.

25214681 is a deficient number, since it is larger than the sum of its proper divisors (20683).

25214681 is a wasteful number, since it uses less digits than its factorization.

25214681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20682.

The product of its digits is 3840, while the sum is 29.

The square root of 25214681 is about 5021.4222088966. The cubic root of 25214681 is about 293.2363641542.

The spelling of 25214681 in words is "twenty-five million, two hundred fourteen thousand, six hundred eighty-one".