402302421 has 24 divisors (see below), whose sum is σ = 586185600. Its totient is φ = 265869216.

The previous prime is 402302393. The next prime is 402302423. The reversal of 402302421 is 124203204.

It is not a de Polignac number, because 402302421 - 2⁵ = 402302389 is a prime.

It is a super-2 number, since 2×402302421² = 323694475884922482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402302394 and 402302403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402302423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 825840 + ... + 826326.

It is an arithmetic number, because the mean of its divisors is an integer number (24424400).

Almost surely, 2^402302421 is an apocalyptic number.

It is an amenable number.

402302421 is a deficient number, since it is larger than the sum of its proper divisors (183883179).

402302421 is a wasteful number, since it uses less digits than its factorization.

402302421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105 (or 1102 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 402302421 is about 20057.4779321828. The cubic root of 402302421 is about 738.2172945089.

Adding to 402302421 its reverse (124203204), we get a palindrome (526505625).

The spelling of 402302421 in words is "four hundred two million, three hundred two thousand, four hundred twenty-one".