1148881 has 6 divisors (see below), whose sum is σ = 1173830. Its totient is φ = 1124448.

The previous prime is 1148879. The next prime is 1148921. The reversal of 1148881 is 1888411.

It can be written as a sum of positive squares in 3 ways, for example, as 665856 + 483025 = 816^2 + 695^2 .

It is not a de Polignac number, because 1148881 - 2¹ = 1148879 is a prime.

It is a super-2 number, since 2×1148881² = 2639855104322, which contains 22 as substring.

It is an Ulam number.

1148881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1148681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2605 + ... + 3013.

2^1148881 is an apocalyptic number.

It is an amenable number.

1148881 is a deficient number, since it is larger than the sum of its proper divisors (24949).

1148881 is an frugal number, since it uses more digits than its factorization.

1148881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515 (or 462 counting only the distinct ones).

The product of its digits is 2048, while the sum is 31.

The square root of 1148881 is about 1071.8586660563. The cubic root of 1148881 is about 104.7349627065.

The spelling of 1148881 in words is "one million, one hundred forty-eight thousand, eight hundred eighty-one".