30274921 has 2 divisors, whose sum is σ = 30274922. Its totient is φ = 30274920.

The previous prime is 30274919. The next prime is 30274939. The reversal of 30274921 is 12947203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18275625 + 11999296 = 4275^2 + 3464^2 .

It is a cyclic number.

It is not a de Polignac number, because 30274921 - 2¹ = 30274919 is a prime.

Together with 30274919, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 30274921.

It is not a weakly prime, because it can be changed into another prime (30274121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15137460 + 15137461.

It is an arithmetic number, because the mean of its divisors is an integer number (15137461).

Almost surely, 2^30274921 is an apocalyptic number.

It is an amenable number.

30274921 is a deficient number, since it is larger than the sum of its proper divisors (1).

30274921 is an equidigital number, since it uses as much as digits as its factorization.

30274921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 30274921 is about 5502.2650790379. The cubic root of 30274921 is about 311.6695252994.

The spelling of 30274921 in words is "thirty million, two hundred seventy-four thousand, nine hundred twenty-one".