25421242 has 32 divisors (see below), whose sum is σ = 47775744. Its totient is φ = 9855600.

The previous prime is 25421237. The next prime is 25421251. The reversal of 25421242 is 24212452.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58767 + ... + 59197.

It is an arithmetic number, because the mean of its divisors is an integer number (1492992).

Almost surely, 2^25421242 is an apocalyptic number.

25421242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25421242 is a deficient number, since it is larger than the sum of its proper divisors (22354502).

25421242 is a wasteful number, since it uses less digits than its factorization.

25421242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834.

The product of its digits is 1280, while the sum is 22.

The square root of 25421242 is about 5041.9482345617. The cubic root of 25421242 is about 294.0349272834.

25421242 divided by its sum of digits (22) gives a palindrome (1155511).

Adding to 25421242 its reverse (24212452), we get a palindrome (49633694).

The spelling of 25421242 in words is "twenty-five million, four hundred twenty-one thousand, two hundred forty-two".