1089157 has 4 divisors (see below), whose sum is σ = 1091340. Its totient is φ = 1086976.

The previous prime is 1089133. The next prime is 1089161. The reversal of 1089157 is 7519801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36481 + 1052676 = 191^2 + 1026^2 .

It is a cyclic number.

It is not a de Polignac number, because 1089157 - 2⁷ = 1089029 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089107) 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, 69 + ... + 1477.

It is an arithmetic number, because the mean of its divisors is an integer number (272835).

2^1089157 is an apocalyptic number.

It is an amenable number.

1089157 is a deficient number, since it is larger than the sum of its proper divisors (2183).

1089157 is an equidigital number, since it uses as much as digits as its factorization.

1089157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182.

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

The square root of 1089157 is about 1043.6268490222. The cubic root of 1089157 is about 102.8877087106.

The spelling of 1089157 in words is "one million, eighty-nine thousand, one hundred fifty-seven".