1016981 has 4 divisors (see below), whose sum is σ = 1162272. Its totient is φ = 871692.

The previous prime is 1016971. The next prime is 1017007. The reversal of 1016981 is 1896101.

1016981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-1016981 is a prime.

It is a super-2 number, since 2×1016981² = 2068500708722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

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 1016981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1016921) 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, 72635 + ... + 72648.

It is an arithmetic number, because the mean of its divisors is an integer number (290568).

2^1016981 is an apocalyptic number.

It is an amenable number.

1016981 is a deficient number, since it is larger than the sum of its proper divisors (145291).

1016981 is an equidigital number, since it uses as much as digits as its factorization.

1016981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145290.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 1016981 is about 1008.4547585291. The cubic root of 1016981 is about 100.5628592836.

The spelling of 1016981 in words is "one million, sixteen thousand, nine hundred eighty-one".