25246221 has 48 divisors (see below), whose sum is σ = 46041408. Its totient is φ = 12096000.

The previous prime is 25246219. The next prime is 25246229. The reversal of 25246221 is 12264252.

It is a happy number.

It is not a de Polignac number, because 25246221 - 2¹ = 25246219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25246191 and 25246200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25246229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20421 + ... + 21621.

It is an arithmetic number, because the mean of its divisors is an integer number (959196).

Almost surely, 2^25246221 is an apocalyptic number.

25246221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25246221 is a deficient number, since it is larger than the sum of its proper divisors (20795187).

25246221 is a wasteful number, since it uses less digits than its factorization.

25246221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242 (or 1235 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 25246221 is about 5024.5617719359. The cubic root of 25246221 is about 293.3585789509.

The spelling of 25246221 in words is "twenty-five million, two hundred forty-six thousand, two hundred twenty-one".