9142279 has 4 divisors (see below), whose sum is σ = 9457560. Its totient is φ = 8827000.

The previous prime is 9142229. The next prime is 9142283. The reversal of 9142279 is 9722419.

It is a happy number.

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 9142279 - 2⁷ = 9142151 is a prime.

It is a Duffinian number.

9142279 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9142229) 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, 157597 + ... + 157654.

It is an arithmetic number, because the mean of its divisors is an integer number (2364390).

Almost surely, 2^9142279 is an apocalyptic number.

9142279 is a deficient number, since it is larger than the sum of its proper divisors (315281).

9142279 is a wasteful number, since it uses less digits than its factorization.

9142279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315280.

The product of its digits is 9072, while the sum is 34.

The square root of 9142279 is about 3023.6201811736. The cubic root of 9142279 is about 209.0987758339.

The spelling of 9142279 in words is "nine million, one hundred forty-two thousand, two hundred seventy-nine".