202421401 has 12 divisors (see below), whose sum is σ = 253583652. Its totient is φ = 160157088.

The previous prime is 202421399. The next prime is 202421411. The reversal of 202421401 is 104124202.

It can be written as a sum of positive squares in 2 ways, for example, as 26832400 + 175589001 = 5180^2 + 13251^2 .

It is not a de Polignac number, because 202421401 - 2¹ = 202421399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (202421411) 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 11 ways as a sum of consecutive naturals, for example, 158250 + ... + 159523.

It is an arithmetic number, because the mean of its divisors is an integer number (21131971).

Almost surely, 2^202421401 is an apocalyptic number.

It is an amenable number.

202421401 is a deficient number, since it is larger than the sum of its proper divisors (51162251).

202421401 is a wasteful number, since it uses less digits than its factorization.

202421401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317800 (or 317793 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 202421401 is about 14227.4875153697. The cubic root of 202421401 is about 587.1541598787.

Adding to 202421401 its reverse (104124202), we get a palindrome (306545603).

The spelling of 202421401 in words is "two hundred two million, four hundred twenty-one thousand, four hundred one".