9142157 has 4 divisors (see below), whose sum is σ = 9226140. Its totient is φ = 9058176.

The previous prime is 9142151. The next prime is 9142171. The reversal of 9142157 is 7512419.

9142157 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7512419 = 17 ⋅441907.

It can be written as a sum of positive squares in 2 ways, for example, as 3290596 + 5851561 = 1814^2 + 2419^2 .

It is a cyclic number.

It is not a de Polignac number, because 9142157 - 2⁶ = 9142093 is a prime.

It is a super-2 number, since 2×9142157² = 167158069225298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9142151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41828 + ... + 42045.

It is an arithmetic number, because the mean of its divisors is an integer number (2306535).

Almost surely, 2^9142157 is an apocalyptic number.

It is an amenable number.

9142157 is a deficient number, since it is larger than the sum of its proper divisors (83983).

9142157 is a wasteful number, since it uses less digits than its factorization.

9142157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83982.

The product of its digits is 2520, while the sum is 29.

The square root of 9142157 is about 3023.6000066146. The cubic root of 9142157 is about 209.0978457171.

The spelling of 9142157 in words is "nine million, one hundred forty-two thousand, one hundred fifty-seven".