7442287 has 4 divisors (see below), whose sum is σ = 7485480. Its totient is φ = 7399096.

The previous prime is 7442249. The next prime is 7442333. The reversal of 7442287 is 7822447.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7442287 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 (7442887) 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, 21337 + ... + 21682.

It is an arithmetic number, because the mean of its divisors is an integer number (1871370).

Almost surely, 2^7442287 is an apocalyptic number.

7442287 is a deficient number, since it is larger than the sum of its proper divisors (43193).

7442287 is a wasteful number, since it uses less digits than its factorization.

7442287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43192.

The product of its digits is 25088, while the sum is 34.

The square root of 7442287 is about 2728.0555346253. The cubic root of 7442287 is about 195.2400025375.

The spelling of 7442287 in words is "seven million, four hundred forty-two thousand, two hundred eighty-seven".