70881 has 4 divisors (see below), whose sum is σ = 94512. Its totient is φ = 47252.

The previous prime is 70879. The next prime is 70891. The reversal of 70881 is 18807.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18807 = 3 ⋅6269.

It is a cyclic number.

It is not a de Polignac number, because 70881 - 2¹ = 70879 is a prime.

It is a super-2 number, since 2×70881² = 10048232322, which contains 22 as substring.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 70881.

It is not an unprimeable number, because it can be changed into a prime (70841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11811 + ... + 11816.

It is an arithmetic number, because the mean of its divisors is an integer number (23628).

2⁷⁰⁸⁸¹ is an apocalyptic number.

It is an amenable number.

70881 is a deficient number, since it is larger than the sum of its proper divisors (23631).

70881 is a wasteful number, since it uses less digits than its factorization.

70881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23630.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 70881 is about 266.2348587244. The cubic root of 70881 is about 41.3850304114.

The spelling of 70881 in words is "seventy thousand, eight hundred eighty-one".