945881 has 2 divisors, whose sum is σ = 945882. Its totient is φ = 945880.

The previous prime is 945851. The next prime is 945883. The reversal of 945881 is 188549.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 912025 + 33856 = 955^2 + 184^2 .

It is a cyclic number.

It is not a de Polignac number, because 945881 - 2⁶ = 945817 is a prime.

It is a super-2 number, since 2×945881² = 1789381732322, which contains 22 as substring.

Together with 945883, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 945881.

It is not a weakly prime, because it can be changed into another prime (945883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472940 + 472941.

It is an arithmetic number, because the mean of its divisors is an integer number (472941).

2⁹⁴⁵⁸⁸¹ is an apocalyptic number.

It is an amenable number.

945881 is a deficient number, since it is larger than the sum of its proper divisors (1).

945881 is an equidigital number, since it uses as much as digits as its factorization.

945881 is an odious number, because the sum of its binary digits is odd.

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

The square root of 945881 is about 972.5641367026. The cubic root of 945881 is about 98.1624751717.

The spelling of 945881 in words is "nine hundred forty-five thousand, eight hundred eighty-one".