1157881 has 8 divisors (see below), whose sum is σ = 1225728. Its totient is φ = 1092000.

The previous prime is 1157873. The next prime is 1157899. The reversal of 1157881 is 1887511.

1157881 = T₁₀₉ + T₁₁₀ + ... + T₂₀₁.

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 1157881 - 2³ = 1157873 is a prime.

It is a super-2 number, since 2×1157881² = 2681376820322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1157831) 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, 816 + ... + 1726.

It is an arithmetic number, because the mean of its divisors is an integer number (153216).

2^1157881 is an apocalyptic number.

It is an amenable number.

1157881 is a deficient number, since it is larger than the sum of its proper divisors (67847).

1157881 is an equidigital number, since it uses as much as digits as its factorization.

1157881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983.

The product of its digits is 2240, while the sum is 31.

The square root of 1157881 is about 1076.0487907154. The cubic root of 1157881 is about 105.0077394144.

The spelling of 1157881 in words is "one million, one hundred fifty-seven thousand, eight hundred eighty-one".