9742157 has 4 divisors (see below), whose sum is σ = 9838716. Its totient is φ = 9645600.

The previous prime is 9742147. The next prime is 9742163. The reversal of 9742157 is 7512479.

9742157 is digitally balanced in base 2, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 8444836 + 1297321 = 2906^2 + 1139^2 .

It is a cyclic number.

It is not a de Polignac number, because 9742157 - 2¹⁰ = 9741133 is a prime.

It is a Duffinian number.

It is a zygodrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9742147) 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, 48128 + ... + 48329.

It is an arithmetic number, because the mean of its divisors is an integer number (2459679).

Almost surely, 2^9742157 is an apocalyptic number.

It is an amenable number.

9742157 is a deficient number, since it is larger than the sum of its proper divisors (96559).

9742157 is a wasteful number, since it uses less digits than its factorization.

9742157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96558.

The product of its digits is 17640, while the sum is 35.

The square root of 9742157 is about 3121.2428614256. The cubic root of 9742157 is about 213.5756358773.

The spelling of 9742157 in words is "nine million, seven hundred forty-two thousand, one hundred fifty-seven".