981157 has 8 divisors (see below), whose sum is σ = 1059840. Its totient is φ = 905520.

The previous prime is 981151. The next prime is 981173. The reversal of 981157 is 751189.

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

It is a cyclic number.

It is not a de Polignac number, because 981157 - 2¹¹ = 979109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69 + ... + 1402.

It is an arithmetic number, because the mean of its divisors is an integer number (132480).

2⁹⁸¹¹⁵⁷ is an apocalyptic number.

It is an amenable number.

981157 is a deficient number, since it is larger than the sum of its proper divisors (78683).

981157 is a wasteful number, since it uses less digits than its factorization.

981157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523.

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

The square root of 981157 is about 990.5336945304. The cubic root of 981157 is about 99.3679130793.

The spelling of 981157 in words is "nine hundred eighty-one thousand, one hundred fifty-seven".