7122491 has 2 divisors, whose sum is σ = 7122492. Its totient is φ = 7122490.

The previous prime is 7122469. The next prime is 7122497. The reversal of 7122491 is 1942217.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7122491 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7122491.

It is not a weakly prime, because it can be changed into another prime (7122497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3561245 + 3561246.

It is an arithmetic number, because the mean of its divisors is an integer number (3561246).

Almost surely, 2^7122491 is an apocalyptic number.

7122491 is a deficient number, since it is larger than the sum of its proper divisors (1).

7122491 is an equidigital number, since it uses as much as digits as its factorization.

7122491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 26.

The square root of 7122491 is about 2668.7995428657. The cubic root of 7122491 is about 192.4024670364.

The spelling of 7122491 in words is "seven million, one hundred twenty-two thousand, four hundred ninety-one".