975981 has 8 divisors (see below), whose sum is σ = 1313280. Its totient is φ = 644672.

The previous prime is 975977. The next prime is 975991. The reversal of 975981 is 189579.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 975981 - 2² = 975977 is a prime.

It is a super-2 number, since 2×975981² = 1905077824722, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 975981.

It is not an unprimeable number, because it can be changed into a prime (975901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1101 + ... + 1778.

It is an arithmetic number, because the mean of its divisors is an integer number (164160).

2⁹⁷⁵⁹⁸¹ is an apocalyptic number.

It is an amenable number.

975981 is a deficient number, since it is larger than the sum of its proper divisors (337299).

975981 is a wasteful number, since it uses less digits than its factorization.

975981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2995.

The product of its digits is 22680, while the sum is 39.

The square root of 975981 is about 987.9175066776. The cubic root of 975981 is about 99.1928695989.

The spelling of 975981 in words is "nine hundred seventy-five thousand, nine hundred eighty-one".