642374 has 4 divisors (see below), whose sum is σ = 963564. Its totient is φ = 321186.

The previous prime is 642373. The next prime is 642403. The reversal of 642374 is 473246.

It is a happy number.

642374 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.

It is a d-powerful number, because it can be written as 6² + 4³ + 3⁴ + 2¹⁹ + 7⁶ + 4⁴ .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 642374.

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 as a sum of consecutive naturals, namely, 160592 + ... + 160595.

It is an arithmetic number, because the mean of its divisors is an integer number (240891).

2⁶⁴²³⁷⁴ is an apocalyptic number.

642374 is a deficient number, since it is larger than the sum of its proper divisors (321190).

642374 is a wasteful number, since it uses less digits than its factorization.

642374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321189.

The product of its digits is 4032, while the sum is 26.

The square root of 642374 is about 801.4823765998. The cubic root of 642374 is about 86.2838108706.

The spelling of 642374 in words is "six hundred forty-two thousand, three hundred seventy-four".