25021420 has 12 divisors (see below), whose sum is σ = 52545024. Its totient is φ = 10008560.

The previous prime is 25021417. The next prime is 25021427. The reversal of 25021420 is 2412052.

It is a junction number, because it is equal to n+sod(n) for n = 25021394 and 25021403.

It is not an unprimeable number, because it can be changed into a prime (25021427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 625516 + ... + 625555.

It is an arithmetic number, because the mean of its divisors is an integer number (4378752).

Almost surely, 2^25021420 is an apocalyptic number.

25021420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25021420 is an abundant number, since it is smaller than the sum of its proper divisors (27523604).

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

25021420 is a wasteful number, since it uses less digits than its factorization.

25021420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251080 (or 1251078 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 25021420 is about 5002.1415413801. The cubic root of 25021420 is about 292.4852599288.

Adding to 25021420 its reverse (2412052), we get a palindrome (27433472).

It can be divided in two parts, 25021 and 420, that multiplied together give a triangular number (10508820 = T₄₅₈₄).

The spelling of 25021420 in words is "twenty-five million, twenty-one thousand, four hundred twenty".