25053021 has 24 divisors (see below), whose sum is σ = 42242304. Its totient is φ = 14009760.

The previous prime is 25052987. The next prime is 25053031. The reversal of 25053021 is 12035052.

It is a happy number.

It is not a de Polignac number, because 25053021 - 2⁷ = 25052893 is a prime.

It is a super-2 number, since 2×25053021² = 1255307722452882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25052985 and 25053003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25053031) 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, 1270 + ... + 7191.

It is an arithmetic number, because the mean of its divisors is an integer number (1760096).

Almost surely, 2^25053021 is an apocalyptic number.

25053021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25053021 is a deficient number, since it is larger than the sum of its proper divisors (17189283).

25053021 is a wasteful number, since it uses less digits than its factorization.

25053021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8521 (or 8518 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 25053021 is about 5005.2992917507. The cubic root of 25053021 is about 292.6083403179.

Adding to 25053021 its reverse (12035052), we get a palindrome (37088073).

The spelling of 25053021 in words is "twenty-five million, fifty-three thousand, twenty-one".