7974157 has 4 divisors (see below), whose sum is σ = 8051680. Its totient is φ = 7896636.

The previous prime is 7974149. The next prime is 7974179. The reversal of 7974157 is 7514797.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7974157 - 2³ = 7974149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7974107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38607 + ... + 38812.

It is an arithmetic number, because the mean of its divisors is an integer number (2012920).

Almost surely, 2^7974157 is an apocalyptic number.

It is an amenable number.

7974157 is a deficient number, since it is larger than the sum of its proper divisors (77523).

7974157 is a wasteful number, since it uses less digits than its factorization.

7974157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77522.

The product of its digits is 61740, while the sum is 40.

The square root of 7974157 is about 2823.8549891947. The cubic root of 7974157 is about 199.7844093535.

The spelling of 7974157 in words is "seven million, nine hundred seventy-four thousand, one hundred fifty-seven".