742239 has 6 divisors (see below), whose sum is σ = 1072136. Its totient is φ = 494820.

The previous prime is 742229. The next prime is 742241. The reversal of 742239 is 932247.

It is not a de Polignac number, because 742239 - 2⁷ = 742111 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 (742219) 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 in 5 ways as a sum of consecutive naturals, for example, 41227 + ... + 41244.

2⁷⁴²²³⁹ is an apocalyptic number.

742239 is a deficient number, since it is larger than the sum of its proper divisors (329897).

742239 is a wasteful number, since it uses less digits than its factorization.

742239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82477 (or 82474 counting only the distinct ones).

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

The square root of 742239 is about 861.5329361087. The cubic root of 742239 is about 90.5415496563.

The spelling of 742239 in words is "seven hundred forty-two thousand, two hundred thirty-nine".