642367 has 8 divisors (see below), whose sum is σ = 731520. Its totient is φ = 558360.

The previous prime is 642361. The next prime is 642373. The reversal of 642367 is 763246.

It is an interprime number because it is at equal distance from previous prime (642361) and next prime (642373).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 642367 - 2³ = 642359 is a prime.

It is a super-3 number, since 3×642367³ = 795190020073334589, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642361) 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 7 ways as a sum of consecutive naturals, for example, 1017 + ... + 1522.

It is an arithmetic number, because the mean of its divisors is an integer number (91440).

2⁶⁴²³⁶⁷ is an apocalyptic number.

642367 is a deficient number, since it is larger than the sum of its proper divisors (89153).

642367 is a wasteful number, since it uses less digits than its factorization.

642367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2573.

The product of its digits is 6048, while the sum is 28.

The square root of 642367 is about 801.4780096796. The cubic root of 642367 is about 86.2834974557.

The spelling of 642367 in words is "six hundred forty-two thousand, three hundred sixty-seven".