945641021 has 24 divisors (see below), whose sum is σ = 1074494016. Its totient is φ = 830269440.

The previous prime is 945641017. The next prime is 945641027. The reversal of 945641021 is 120146549.

It is not a de Polignac number, because 945641021 - 2² = 945641017 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 (945641027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 819581 + ... + 820733.

It is an arithmetic number, because the mean of its divisors is an integer number (44770584).

Almost surely, 2^945641021 is an apocalyptic number.

It is an amenable number.

945641021 is a deficient number, since it is larger than the sum of its proper divisors (128852995).

945641021 is a wasteful number, since it uses less digits than its factorization.

945641021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1413 (or 1400 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 945641021 is about 30751.2767377226. The cubic root of 945641021 is about 981.5417288517.

The spelling of 945641021 in words is "nine hundred forty-five million, six hundred forty-one thousand, twenty-one".