2242921 has 2 divisors, whose sum is σ = 2242922. Its totient is φ = 2242920.

The previous prime is 2242883. The next prime is 2242939. The reversal of 2242921 is 1292422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1929321 + 313600 = 1389^2 + 560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2242921 is a prime.

It is a super-2 number, since 2×2242921² = 10061389224482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2242892 and 2242901.

It is not a weakly prime, because it can be changed into another prime (2242951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1121460 + 1121461.

It is an arithmetic number, because the mean of its divisors is an integer number (1121461).

2^2242921 is an apocalyptic number.

It is an amenable number.

2242921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2242921 is an equidigital number, since it uses as much as digits as its factorization.

2242921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 22.

The square root of 2242921 is about 1497.6384743989. The cubic root of 2242921 is about 130.8995014224.

The spelling of 2242921 in words is "two million, two hundred forty-two thousand, nine hundred twenty-one".