2397157 has 4 divisors (see below), whose sum is σ = 2739616. Its totient is φ = 2054700.

The previous prime is 2397151. The next prime is 2397167. The reversal of 2397157 is 7517932.

2397157 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2397157 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 (2397151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171219 + ... + 171232.

It is an arithmetic number, because the mean of its divisors is an integer number (684904).

2^2397157 is an apocalyptic number.

It is an amenable number.

2397157 is a deficient number, since it is larger than the sum of its proper divisors (342459).

2397157 is an equidigital number, since it uses as much as digits as its factorization.

2397157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342458.

The product of its digits is 13230, while the sum is 34.

The square root of 2397157 is about 1548.2754922817. The cubic root of 2397157 is about 133.8337025200.

It can be divided in two parts, 239 and 7157, that added together give a square (7396 = 86²).

The spelling of 2397157 in words is "two million, three hundred ninety-seven thousand, one hundred fifty-seven".