7245991 has 2 divisors, whose sum is σ = 7245992. Its totient is φ = 7245990.

The previous prime is 7245949. The next prime is 7246039. The reversal of 7245991 is 1995427.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7245991 - 2⁷ = 7245863 is a prime.

7245991 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7245991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7245941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3622995 + 3622996.

It is an arithmetic number, because the mean of its divisors is an integer number (3622996).

Almost surely, 2^7245991 is an apocalyptic number.

7245991 is a deficient number, since it is larger than the sum of its proper divisors (1).

7245991 is an equidigital number, since it uses as much as digits as its factorization.

7245991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 37.

The square root of 7245991 is about 2691.8378480139. The cubic root of 7245991 is about 193.5081510987.

The spelling of 7245991 in words is "seven million, two hundred forty-five thousand, nine hundred ninety-one".