25126221 has 8 divisors (see below), whose sum is σ = 35472384. Its totient is φ = 15765440.

The previous prime is 25126217. The next prime is 25126223. The reversal of 25126221 is 12262152.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25126221 - 2² = 25126217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25126223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246285 + ... + 246386.

It is an arithmetic number, because the mean of its divisors is an integer number (4434048).

Almost surely, 2^25126221 is an apocalyptic number.

It is an amenable number.

25126221 is a deficient number, since it is larger than the sum of its proper divisors (10346163).

25126221 is a wasteful number, since it uses less digits than its factorization.

25126221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492691.

The product of its digits is 480, while the sum is 21.

The square root of 25126221 is about 5012.6062083511. The cubic root of 25126221 is about 292.8930445547.

Adding to 25126221 its reverse (12262152), we get a palindrome (37388373).

The spelling of 25126221 in words is "twenty-five million, one hundred twenty-six thousand, two hundred twenty-one".