25011021 has 24 divisors (see below), whose sum is σ = 40137120. Its totient is φ = 13796832.

The previous prime is 25010989. The next prime is 25011023. The reversal of 25011021 is 12011052.

It is not a de Polignac number, because 25011021 - 2⁵ = 25010989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25010988 and 25011006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25011023) 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, 1330 + ... + 7196.

It is an arithmetic number, because the mean of its divisors is an integer number (1672380).

Almost surely, 2^25011021 is an apocalyptic number.

25011021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25011021 is a deficient number, since it is larger than the sum of its proper divisors (15126099).

25011021 is a wasteful number, since it uses less digits than its factorization.

25011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5913 (or 5906 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 25011021 is about 5001.1019785643. The cubic root of 25011021 is about 292.4447349749. Note that the first 3 decimals are identical.

Adding to 25011021 its reverse (12011052), we get a palindrome (37022073).

The spelling of 25011021 in words is "twenty-five million, eleven thousand, twenty-one".