25421010 has 16 divisors (see below), whose sum is σ = 61010496. Its totient is φ = 6778928.

The previous prime is 25420979. The next prime is 25421021. The reversal of 25421010 is 1012452.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423654 + ... + 423713.

It is an arithmetic number, because the mean of its divisors is an integer number (3813156).

Almost surely, 2^25421010 is an apocalyptic number.

25421010 is an abundant number, since it is smaller than the sum of its proper divisors (35589486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25421010 is a wasteful number, since it uses less digits than its factorization.

25421010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847377.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 25421010 is about 5041.9252275297. The cubic root of 25421010 is about 294.0340328042.

Adding to 25421010 its reverse (1012452), we get a palindrome (26433462).

The spelling of 25421010 in words is "twenty-five million, four hundred twenty-one thousand, ten".