7991249 has 16 divisors (see below), whose sum is σ = 9461760. Its totient is φ = 6607440.

The previous prime is 7991239. The next prime is 7991251. The reversal of 7991249 is 9421997.

It is a happy number.

It is not a de Polignac number, because 7991249 - 2⁴ = 7991233 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7991209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41744 + ... + 41934.

It is an arithmetic number, because the mean of its divisors is an integer number (591360).

Almost surely, 2^7991249 is an apocalyptic number.

It is an amenable number.

7991249 is a deficient number, since it is larger than the sum of its proper divisors (1470511).

7991249 is a wasteful number, since it uses less digits than its factorization.

7991249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380.

The product of its digits is 40824, while the sum is 41.

The square root of 7991249 is about 2826.8797286054. The cubic root of 7991249 is about 199.9270483936.

It can be divided in two parts, 799 and 1249, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 7991249 in words is "seven million, nine hundred ninety-one thousand, two hundred forty-nine".