642377 has 4 divisors (see below), whose sum is σ = 657360. Its totient is φ = 627396.

The previous prime is 642373. The next prime is 642403. The reversal of 642377 is 773246.

642377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 642377 - 2² = 642373 is a prime.

It is a d-powerful number, because it can be written as 6 + 4³ + 3³ + 2¹⁹ + 7³ + 7⁶ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642373) 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, 7427 + ... + 7512.

It is an arithmetic number, because the mean of its divisors is an integer number (164340).

2⁶⁴²³⁷⁷ is an apocalyptic number.

It is an amenable number.

642377 is a deficient number, since it is larger than the sum of its proper divisors (14983).

642377 is a wasteful number, since it uses less digits than its factorization.

642377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14982.

The product of its digits is 7056, while the sum is 29.

The square root of 642377 is about 801.4842481297. The cubic root of 642377 is about 86.2839451907.

The spelling of 642377 in words is "six hundred forty-two thousand, three hundred seventy-seven".