642282371 has 4 divisors (see below), whose sum is σ = 659641392. Its totient is φ = 624923352.

The previous prime is 642282349. The next prime is 642282409. The reversal of 642282371 is 173282246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 173282246 = 2 ⋅86641123.

It is a cyclic number.

It is not a de Polignac number, because 642282371 - 2¹⁸ = 642020227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642282341) 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 3 ways as a sum of consecutive naturals, for example, 8679455 + ... + 8679528.

It is an arithmetic number, because the mean of its divisors is an integer number (164910348).

Almost surely, 2^642282371 is an apocalyptic number.

642282371 is a deficient number, since it is larger than the sum of its proper divisors (17359021).

642282371 is a wasteful number, since it uses less digits than its factorization.

642282371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17359020.

The product of its digits is 32256, while the sum is 35.

The square root of 642282371 is about 25343.2904532936. The cubic root of 642282371 is about 862.7970813338.

The spelling of 642282371 in words is "six hundred forty-two million, two hundred eighty-two thousand, three hundred seventy-one".