1170981 has 12 divisors (see below), whose sum is σ = 1933152. Its totient is φ = 669096.

The previous prime is 1170979. The next prime is 1171031. The reversal of 1170981 is 1890711.

It is not a de Polignac number, because 1170981 - 2¹ = 1170979 is a prime.

It is a super-2 number, since 2×1170981² = 2742393004722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1170941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9231 + ... + 9356.

It is an arithmetic number, because the mean of its divisors is an integer number (161096).

2^1170981 is an apocalyptic number.

It is an amenable number.

1170981 is a deficient number, since it is larger than the sum of its proper divisors (762171).

1170981 is a wasteful number, since it uses less digits than its factorization.

1170981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18600 (or 18597 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 27.

The square root of 1170981 is about 1082.1187550357. The cubic root of 1170981 is about 105.4022664293.

The spelling of 1170981 in words is "one million, one hundred seventy thousand, nine hundred eighty-one".