942721 has 8 divisors (see below), whose sum is σ = 1025024. Its totient is φ = 861840.

The previous prime is 942719. The next prime is 942727. The reversal of 942721 is 127249.

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 942721 - 2¹ = 942719 is a prime.

942721 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (942727) 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, 1366 + ... + 1936.

It is an arithmetic number, because the mean of its divisors is an integer number (128128).

2⁹⁴²⁷²¹ is an apocalyptic number.

It is an amenable number.

942721 is a deficient number, since it is larger than the sum of its proper divisors (82303).

942721 is a wasteful number, since it uses less digits than its factorization.

942721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711.

The product of its digits is 1008, while the sum is 25.

The square root of 942721 is about 970.9382060667. The cubic root of 942721 is about 98.0530394549.

The spelling of 942721 in words is "nine hundred forty-two thousand, seven hundred twenty-one".