302135421 has 24 divisors (see below), whose sum is σ = 474568320. Its totient is φ = 170456832.

The previous prime is 302135417. The next prime is 302135423. The reversal of 302135421 is 124531203.

It is not a de Polignac number, because 302135421 - 2² = 302135417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (302135423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1396 + ... + 24621.

It is an arithmetic number, because the mean of its divisors is an integer number (19773680).

Almost surely, 2^302135421 is an apocalyptic number.

It is an amenable number.

302135421 is a deficient number, since it is larger than the sum of its proper divisors (172432899).

302135421 is a wasteful number, since it uses less digits than its factorization.

302135421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26113 (or 26106 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 302135421 is about 17382.0430617347. The cubic root of 302135421 is about 671.0175531029.

Adding to 302135421 its reverse (124531203), we get a palindrome (426666624).

The spelling of 302135421 in words is "three hundred two million, one hundred thirty-five thousand, four hundred twenty-one".