302240921 has 2 divisors, whose sum is σ = 302240922. Its totient is φ = 302240920.

The previous prime is 302240903. The next prime is 302240933. The reversal of 302240921 is 129042203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 277688896 + 24552025 = 16664^2 + 4955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-302240921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (302242921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151120460 + 151120461.

It is an arithmetic number, because the mean of its divisors is an integer number (151120461).

Almost surely, 2^302240921 is an apocalyptic number.

It is an amenable number.

302240921 is a deficient number, since it is larger than the sum of its proper divisors (1).

302240921 is an equidigital number, since it uses as much as digits as its factorization.

302240921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 302240921 is about 17385.0775379347. The cubic root of 302240921 is about 671.0956462456.

The spelling of 302240921 in words is "three hundred two million, two hundred forty thousand, nine hundred twenty-one".