1125881 has 4 divisors (see below), whose sum is σ = 1128564. Its totient is φ = 1123200.

The previous prime is 1125871. The next prime is 1125899. The reversal of 1125881 is 1885211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1885211 = 653 ⋅2887.

It can be written as a sum of positive squares in 2 ways, for example, as 511225 + 614656 = 715^2 + 784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1125881 is a prime.

It is a super-2 number, since 2×1125881² = 2535216052322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1125881.

It is not an unprimeable number, because it can be changed into a prime (1125811) 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, 560 + ... + 1601.

It is an arithmetic number, because the mean of its divisors is an integer number (282141).

2^1125881 is an apocalyptic number.

It is an amenable number.

1125881 is a deficient number, since it is larger than the sum of its proper divisors (2683).

1125881 is an equidigital number, since it uses as much as digits as its factorization.

1125881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2682.

The product of its digits is 640, while the sum is 26.

The square root of 1125881 is about 1061.0753978865. The cubic root of 1125881 is about 104.0313330147.

The spelling of 1125881 in words is "one million, one hundred twenty-five thousand, eight hundred eighty-one".