25234821 has 24 divisors (see below), whose sum is σ = 38176320. Its totient is φ = 16656192.

The previous prime is 25234771. The next prime is 25234823. The reversal of 25234821 is 12843252.

It is not a de Polignac number, because 25234821 - 2⁶ = 25234757 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25234823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27000 + ... + 27918.

It is an arithmetic number, because the mean of its divisors is an integer number (1590680).

Almost surely, 2^25234821 is an apocalyptic number.

It is an amenable number.

25234821 is a deficient number, since it is larger than the sum of its proper divisors (12941499).

25234821 is an equidigital number, since it uses as much as digits as its factorization.

25234821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047 (or 1035 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 25234821 is about 5023.4272165525. The cubic root of 25234821 is about 293.3144166807.

The spelling of 25234821 in words is "twenty-five million, two hundred thirty-four thousand, eight hundred twenty-one".