302981 has 4 divisors (see below), whose sum is σ = 346272. Its totient is φ = 259692.

The previous prime is 302977. The next prime is 302983. The reversal of 302981 is 189203.

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 302981 - 2² = 302977 is a prime.

It is a super-2 number, since 2×302981² = 183594972722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 302981.

It is not an unprimeable number, because it can be changed into a prime (302983) 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, 21635 + ... + 21648.

It is an arithmetic number, because the mean of its divisors is an integer number (86568).

2³⁰²⁹⁸¹ is an apocalyptic number.

It is an amenable number.

302981 is a deficient number, since it is larger than the sum of its proper divisors (43291).

302981 is an equidigital number, since it uses as much as digits as its factorization.

302981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43290.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 302981 is about 550.4370990404. The cubic root of 302981 is about 67.1642956826.

The spelling of 302981 in words is "three hundred two thousand, nine hundred eighty-one".