120171157 has 4 divisors (see below), whose sum is σ = 124315020. Its totient is φ = 116027296.

The previous prime is 120171137. The next prime is 120171169. The reversal of 120171157 is 751171021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 751171021 = 29 ⋅25902449.

It can be written as a sum of positive squares in 2 ways, for example, as 45279441 + 74891716 = 6729^2 + 8654^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120171157 is a prime.

It is a super-2 number, since 2×120171157² = 28882213949437298, 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 (120171127) 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, 2071888 + ... + 2071945.

It is an arithmetic number, because the mean of its divisors is an integer number (31078755).

Almost surely, 2^120171157 is an apocalyptic number.

It is an amenable number.

120171157 is a deficient number, since it is larger than the sum of its proper divisors (4143863).

120171157 is an equidigital number, since it uses as much as digits as its factorization.

120171157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4143862.

The product of its (nonzero) digits is 490, while the sum is 25.

The square root of 120171157 is about 10962.2605789135. The cubic root of 120171157 is about 493.4768087176.

The spelling of 120171157 in words is "one hundred twenty million, one hundred seventy-one thousand, one hundred fifty-seven".