25976221 has 4 divisors (see below), whose sum is σ = 27504252. Its totient is φ = 24448192.

The previous prime is 25976219. The next prime is 25976231. The reversal of 25976221 is 12267952.

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 21288996 + 4687225 = 4614^2 + 2165^2 .

It is a cyclic number.

It is not a de Polignac number, because 25976221 - 2¹ = 25976219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25976231) 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, 763990 + ... + 764023.

It is an arithmetic number, because the mean of its divisors is an integer number (6876063).

Almost surely, 2^25976221 is an apocalyptic number.

It is an amenable number.

25976221 is a deficient number, since it is larger than the sum of its proper divisors (1528031).

25976221 is a wasteful number, since it uses less digits than its factorization.

25976221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528030.

The product of its digits is 15120, while the sum is 34.

The square root of 25976221 is about 5096.6872574252. The cubic root of 25976221 is about 296.1592649423.

The spelling of 25976221 in words is "twenty-five million, nine hundred seventy-six thousand, two hundred twenty-one".