7942287 has 4 divisors (see below), whose sum is σ = 10589720. Its totient is φ = 5294856.

The previous prime is 7942279. The next prime is 7942303. The reversal of 7942287 is 7822497.

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

It is not a de Polignac number, because 7942287 - 2³ = 7942279 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 (7942267) 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, 1323712 + ... + 1323717.

It is an arithmetic number, because the mean of its divisors is an integer number (2647430).

Almost surely, 2^7942287 is an apocalyptic number.

7942287 is a deficient number, since it is larger than the sum of its proper divisors (2647433).

7942287 is a wasteful number, since it uses less digits than its factorization.

7942287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647432.

The product of its digits is 56448, while the sum is 39.

The square root of 7942287 is about 2818.2063444681. The cubic root of 7942287 is about 199.5178971513.

It can be divided in two parts, 794 and 2287, that added together give a triangular number (3081 = T₇₈).

The spelling of 7942287 in words is "seven million, nine hundred forty-two thousand, two hundred eighty-seven".