945721 has 8 divisors (see below), whose sum is σ = 1088640. Its totient is φ = 804768.

The previous prime is 945701. The next prime is 945731. The reversal of 945721 is 127549.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 945721 - 2⁹ = 945209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 945721.

It is not an unprimeable number, because it can be changed into a prime (945701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 765 + ... + 1573.

It is an arithmetic number, because the mean of its divisors is an integer number (136080).

2⁹⁴⁵⁷²¹ is an apocalyptic number.

It is an amenable number.

945721 is a deficient number, since it is larger than the sum of its proper divisors (142919).

945721 is a wasteful number, since it uses less digits than its factorization.

945721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983.

The product of its digits is 2520, while the sum is 28.

The square root of 945721 is about 972.4818764378. The cubic root of 945721 is about 98.1569399857.

The spelling of 945721 in words is "nine hundred forty-five thousand, seven hundred twenty-one".