912881 has 4 divisors (see below), whose sum is σ = 932352. Its totient is φ = 893412.

The previous prime is 912871. The next prime is 912911. The reversal of 912881 is 188219.

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: 188219 = 37 ⋅5087.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-912881 is a prime.

It is a super-2 number, since 2×912881² = 1666703440322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (912851) 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, 9665 + ... + 9758.

It is an arithmetic number, because the mean of its divisors is an integer number (233088).

2⁹¹²⁸⁸¹ is an apocalyptic number.

It is an amenable number.

912881 is a deficient number, since it is larger than the sum of its proper divisors (19471).

912881 is a wasteful number, since it uses less digits than its factorization.

912881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19470.

The product of its digits is 1152, while the sum is 29.

The square root of 912881 is about 955.4480624294. The cubic root of 912881 is about 97.0073682715.

The spelling of 912881 in words is "nine hundred twelve thousand, eight hundred eighty-one".