157198 has 8 divisors (see below), whose sum is σ = 240408. Its totient is φ = 77064.

The previous prime is 157189. The next prime is 157207. The reversal of 157198 is 891751.

It is an interprime number because it is at equal distance from previous prime (157189) and next prime (157207).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×157198² = 49422422408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

157198 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636 + ... + 847.

It is an arithmetic number, because the mean of its divisors is an integer number (30051).

2¹⁵⁷¹⁹⁸ is an apocalyptic number.

157198 is a deficient number, since it is larger than the sum of its proper divisors (83210).

157198 is a wasteful number, since it uses less digits than its factorization.

157198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538.

The product of its digits is 2520, while the sum is 31.

The square root of 157198 is about 396.4820298576. The cubic root of 157198 is about 53.9695759119.

The spelling of 157198 in words is "one hundred fifty-seven thousand, one hundred ninety-eight".