7442239 has 4 divisors (see below), whose sum is σ = 8505424. Its totient is φ = 6379056.

The previous prime is 7442233. The next prime is 7442249. The reversal of 7442239 is 9322447.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7442239 - 2³ = 7442231 is a prime.

It is a Duffinian number.

7442239 is a lucky number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 7442239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7442231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531582 + ... + 531595.

It is an arithmetic number, because the mean of its divisors is an integer number (2126356).

Almost surely, 2^7442239 is an apocalyptic number.

7442239 is a deficient number, since it is larger than the sum of its proper divisors (1063185).

7442239 is a wasteful number, since it uses less digits than its factorization.

7442239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063184.

The product of its digits is 12096, while the sum is 31.

The square root of 7442239 is about 2728.0467371363. The cubic root of 7442239 is about 195.2395827946.

The spelling of 7442239 in words is "seven million, four hundred forty-two thousand, two hundred thirty-nine".