1125681 has 4 divisors (see below), whose sum is σ = 1500912. Its totient is φ = 750452.

The previous prime is 1125679. The next prime is 1125701. The reversal of 1125681 is 1865211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1125681 - 2¹ = 1125679 is a prime.

It is a super-2 number, since 2×1125681² = 2534315427522, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1125581) 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, 187611 + ... + 187616.

It is an arithmetic number, because the mean of its divisors is an integer number (375228).

2^1125681 is an apocalyptic number.

It is an amenable number.

1125681 is a deficient number, since it is larger than the sum of its proper divisors (375231).

1125681 is an equidigital number, since it uses as much as digits as its factorization.

1125681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375230.

The product of its digits is 480, while the sum is 24.

The square root of 1125681 is about 1060.9811496912. The cubic root of 1125681 is about 104.0251726541.

The spelling of 1125681 in words is "one million, one hundred twenty-five thousand, six hundred eighty-one".