981671 has 4 divisors (see below), whose sum is σ = 984072. Its totient is φ = 979272.

The previous prime is 981653. The next prime is 981683. The reversal of 981671 is 176189.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176189 = 13 ⋅13553.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981601) 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, 416 + ... + 1461.

It is an arithmetic number, because the mean of its divisors is an integer number (246018).

2⁹⁸¹⁶⁷¹ is an apocalyptic number.

981671 is a deficient number, since it is larger than the sum of its proper divisors (2401).

981671 is a wasteful number, since it uses less digits than its factorization.

981671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400.

The product of its digits is 3024, while the sum is 32.

The square root of 981671 is about 990.7931166495. The cubic root of 981671 is about 99.3852620496.

The spelling of 981671 in words is "nine hundred eighty-one thousand, six hundred seventy-one".