202421025 has 30 divisors (see below), whose sum is σ = 374957462. Its totient is φ = 107956800.

The previous prime is 202421017. The next prime is 202421027. The reversal of 202421025 is 520124202.

It can be written as a sum of positive squares in 3 ways, for example, as 3272481 + 199148544 = 1809^2 + 14112^2 .

It is not a de Polignac number, because 202421025 - 2³ = 202421017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202420989 and 202421007.

It is not an unprimeable number, because it can be changed into a prime (202421027) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 47956 + ... + 52005.

Almost surely, 2^202421025 is an apocalyptic number.

202421025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

202421025 is a deficient number, since it is larger than the sum of its proper divisors (172536437).

202421025 is an equidigital number, since it uses as much as digits as its factorization.

202421025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99983 (or 99969 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 202421025 is about 14227.4743015055. The cubic root of 202421025 is about 587.1537963300.

Adding to 202421025 its reverse (520124202), we get a palindrome (722545227).

The spelling of 202421025 in words is "two hundred two million, four hundred twenty-one thousand, twenty-five".