1180981 has 4 divisors (see below), whose sum is σ = 1232352. Its totient is φ = 1129612.

The previous prime is 1180979. The next prime is 1180987. The reversal of 1180981 is 1890811.

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 1180981 - 2¹ = 1180979 is a prime.

It is a super-2 number, since 2×1180981² = 2789432244722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1180987) 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, 25651 + ... + 25696.

It is an arithmetic number, because the mean of its divisors is an integer number (308088).

2^1180981 is an apocalyptic number.

It is an amenable number.

1180981 is a deficient number, since it is larger than the sum of its proper divisors (51371).

1180981 is an equidigital number, since it uses as much as digits as its factorization.

1180981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51370.

The product of its (nonzero) digits is 576, while the sum is 28.

The square root of 1180981 is about 1086.7294971611. The cubic root of 1180981 is about 105.7014561459.

The spelling of 1180981 in words is "one million, one hundred eighty thousand, nine hundred eighty-one".