7991253 has 12 divisors (see below), whose sum is σ = 11583468. Its totient is φ = 5308800.

The previous prime is 7991251. The next prime is 7991257. The reversal of 7991253 is 3521997.

It can be written as a sum of positive squares in 2 ways, for example, as 1954404 + 6036849 = 1398^2 + 2457^2 .

It is not a de Polignac number, because 7991253 - 2¹ = 7991251 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7991251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1453 + ... + 4253.

It is an arithmetic number, because the mean of its divisors is an integer number (965289).

Almost surely, 2^7991253 is an apocalyptic number.

It is an amenable number.

7991253 is a deficient number, since it is larger than the sum of its proper divisors (3592215).

7991253 is a wasteful number, since it uses less digits than its factorization.

7991253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3124 (or 3121 counting only the distinct ones).

The product of its digits is 17010, while the sum is 36.

The square root of 7991253 is about 2826.8804360991. The cubic root of 7991253 is about 199.9270817512.

The spelling of 7991253 in words is "seven million, nine hundred ninety-one thousand, two hundred fifty-three".