202402421 has 8 divisors (see below), whose sum is σ = 229444320. Its totient is φ = 176999472.

The previous prime is 202402411. The next prime is 202402423. The reversal of 202402421 is 124204202.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-202402421 is a prime.

It is a super-2 number, since 2×202402421² = 81933480053322482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202402421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202402423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409475 + ... + 409968.

It is an arithmetic number, because the mean of its divisors is an integer number (28680540).

Almost surely, 2^202402421 is an apocalyptic number.

It is an amenable number.

202402421 is a deficient number, since it is larger than the sum of its proper divisors (27041899).

202402421 is a wasteful number, since it uses less digits than its factorization.

202402421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819475.

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

The square root of 202402421 is about 14226.8204810492. The cubic root of 202402421 is about 587.1358078431.

Adding to 202402421 its reverse (124204202), we get a palindrome (326606623).

The spelling of 202402421 in words is "two hundred two million, four hundred two thousand, four hundred twenty-one".