881945 has 4 divisors (see below), whose sum is σ = 1058340. Its totient is φ = 705552.

The previous prime is 881939. The next prime is 881953. The reversal of 881945 is 549188.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 614656 + 267289 = 784^2 + 517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-881945 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88190 + ... + 88199.

It is an arithmetic number, because the mean of its divisors is an integer number (264585).

2⁸⁸¹⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

881945 is a deficient number, since it is larger than the sum of its proper divisors (176395).

881945 is a wasteful number, since it uses less digits than its factorization.

881945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176394.

The product of its digits is 11520, while the sum is 35.

The square root of 881945 is about 939.1192682508. The cubic root of 881945 is about 95.8989460360.

The spelling of 881945 in words is "eight hundred eighty-one thousand, nine hundred forty-five".