7492921 has 2 divisors, whose sum is σ = 7492922. Its totient is φ = 7492920.

The previous prime is 7492909. The next prime is 7492943. The reversal of 7492921 is 1292947.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7485696 + 7225 = 2736^2 + 85^2 .

It is an emirp because it is prime and its reverse (1292947) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7492921 is a prime.

It is a super-2 number, since 2×7492921² = 112287730224482, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (7493921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3746460 + 3746461.

It is an arithmetic number, because the mean of its divisors is an integer number (3746461).

Almost surely, 2^7492921 is an apocalyptic number.

It is an amenable number.

7492921 is a deficient number, since it is larger than the sum of its proper divisors (1).

7492921 is an equidigital number, since it uses as much as digits as its factorization.

7492921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 7492921 is about 2737.3200397469. The cubic root of 7492921 is about 195.6817774543.

The spelling of 7492921 in words is "seven million, four hundred ninety-two thousand, nine hundred twenty-one".