422739 has 20 divisors (see below), whose sum is σ = 670824. Its totient is φ = 264384.

The previous prime is 422711. The next prime is 422749. The reversal of 422739 is 937224.

It is not a de Polignac number, because 422739 - 2⁵ = 422707 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

Its product of digits (3024) is a multiple of the sum of its prime factors (336).

422739 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (422749) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 1224 + ... + 1530.

2⁴²²⁷³⁹ is an apocalyptic number.

422739 is a deficient number, since it is larger than the sum of its proper divisors (248085).

422739 is a wasteful number, since it uses less digits than its factorization.

422739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336 (or 327 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 422739 is about 650.1838201617. The cubic root of 422739 is about 75.0511650872.

The spelling of 422739 in words is "four hundred twenty-two thousand, seven hundred thirty-nine".