25221026 has 4 divisors (see below), whose sum is σ = 37831542. Its totient is φ = 12610512.

The previous prime is 25221023. The next prime is 25221043. The reversal of 25221026 is 62012252.

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

It can be written as a sum of positive squares in only one way, i.e., 18966025 + 6255001 = 4355^2 + 2501^2 .

It is a super-2 number, since 2×25221026² = 1272200304985352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25220989 and 25221007.

It is not an unprimeable number, because it can be changed into a prime (25221023) 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 as a sum of consecutive naturals, namely, 6305255 + ... + 6305258.

Almost surely, 2^25221026 is an apocalyptic number.

25221026 is a deficient number, since it is larger than the sum of its proper divisors (12610516).

25221026 is a wasteful number, since it uses less digits than its factorization.

25221026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12610515.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 25221026 is about 5022.0539622748. The cubic root of 25221026 is about 293.2609586710.

Adding to 25221026 its reverse (62012252), we get a palindrome (87233278).

The spelling of 25221026 in words is "twenty-five million, two hundred twenty-one thousand, twenty-six".