25002021 has 16 divisors (see below), whose sum is σ = 36453888. Its totient is φ = 15116400.

The previous prime is 25002001. The next prime is 25002037. The reversal of 25002021 is 12020052.

It is not a de Polignac number, because 25002021 - 2⁶ = 25001957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25001988 and 25002006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25002001) 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 in 15 ways as a sum of consecutive naturals, for example, 20766 + ... + 21936.

It is an arithmetic number, because the mean of its divisors is an integer number (2278368).

Almost surely, 2^25002021 is an apocalyptic number.

It is an amenable number.

25002021 is a deficient number, since it is larger than the sum of its proper divisors (11451867).

25002021 is a wasteful number, since it uses less digits than its factorization.

25002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1832.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 25002021 is about 5000.2020959157. The cubic root of 25002021 is about 292.4096528621.

Adding to 25002021 its reverse (12020052), we get a palindrome (37022073).

It can be divided in two parts, 250020 and 21, that multiplied together give a triangular number (5250420 = T₃₂₄₀).

The spelling of 25002021 in words is "twenty-five million, two thousand, twenty-one".