25421024 has 12 divisors (see below), whose sum is σ = 50047704. Its totient is φ = 12710496.

The previous prime is 25421021. The next prime is 25421027. The reversal of 25421024 is 42012452.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25421021) and next prime (25421027).

It is a super-2 number, since 2×25421024² = 1292456922417152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25420987 and 25421005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25421021) 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, 397172 + ... + 397235.

It is an arithmetic number, because the mean of its divisors is an integer number (4170642).

Almost surely, 2^25421024 is an apocalyptic number.

It is an amenable number.

25421024 is a deficient number, since it is larger than the sum of its proper divisors (24626680).

25421024 is an equidigital number, since it uses as much as digits as its factorization.

25421024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794417 (or 794409 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 25421024 is about 5041.9266158880. The cubic root of 25421024 is about 294.0340867816.

Adding to 25421024 its reverse (42012452), we get a palindrome (67433476).

The spelling of 25421024 in words is "twenty-five million, four hundred twenty-one thousand, twenty-four".