202042421 has 8 divisors (see below), whose sum is σ = 233829120. Its totient is φ = 170986608.

The previous prime is 202042411. The next prime is 202042427. The reversal of 202042421 is 124240202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202042421 - 2¹⁴ = 202026037 is a prime.

It is a super-2 number, since 2×202042421² = 81642279767082482, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 202042421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202042427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182126 + ... + 183231.

It is an arithmetic number, because the mean of its divisors is an integer number (29228640).

Almost surely, 2^202042421 is an apocalyptic number.

It is an amenable number.

202042421 is a deficient number, since it is larger than the sum of its proper divisors (31786699).

202042421 is an equidigital number, since it uses as much as digits as its factorization.

202042421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365443.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 202042421 is about 14214.1626907813. The cubic root of 202042421 is about 586.7875011878.

Adding to 202042421 its reverse (124240202), we get a palindrome (326282623).

The spelling of 202042421 in words is "two hundred two million, forty-two thousand, four hundred twenty-one".