202801421 has 4 divisors (see below), whose sum is σ = 213475200. Its totient is φ = 192127644.

The previous prime is 202801409. The next prime is 202801427. The reversal of 202801421 is 124108202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 202801421 - 2¹⁰ = 202800397 is a prime.

It is a super-2 number, since 2×202801421² = 82256832719238482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202801393 and 202801402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202801427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5336861 + ... + 5336898.

It is an arithmetic number, because the mean of its divisors is an integer number (53368800).

Almost surely, 2^202801421 is an apocalyptic number.

It is an amenable number.

202801421 is a deficient number, since it is larger than the sum of its proper divisors (10673779).

202801421 is a wasteful number, since it uses less digits than its factorization.

202801421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10673778.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 202801421 is about 14240.8363869542. The cubic root of 202801421 is about 587.5213655124.

Adding to 202801421 its reverse (124108202), we get a palindrome (326909623).

The spelling of 202801421 in words is "two hundred two million, eight hundred one thousand, four hundred twenty-one".