157742207 has 4 divisors (see below), whose sum is σ = 180276816. Its totient is φ = 135207600.

The previous prime is 157742203. The next prime is 157742213. The reversal of 157742207 is 702247751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 702247751 = 1607 ⋅436993.

It is a cyclic number.

It is not a de Polignac number, because 157742207 - 2² = 157742203 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 (157742203) 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, 11267294 + ... + 11267307.

It is an arithmetic number, because the mean of its divisors is an integer number (45069204).

Almost surely, 2^157742207 is an apocalyptic number.

157742207 is a deficient number, since it is larger than the sum of its proper divisors (22534609).

157742207 is an equidigital number, since it uses as much as digits as its factorization.

157742207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22534608.

The product of its (nonzero) digits is 27440, while the sum is 35.

The square root of 157742207 is about 12559.5464488173. The cubic root of 157742207 is about 540.3178364375.

Adding to 157742207 its reverse (702247751), we get a palindrome (859989958).

The spelling of 157742207 in words is "one hundred fifty-seven million, seven hundred forty-two thousand, two hundred seven".