642074 has 4 divisors (see below), whose sum is σ = 963114. Its totient is φ = 321036.

The previous prime is 642071. The next prime is 642077. The reversal of 642074 is 470246.

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

It is an interprime number because it is at equal distance from previous prime (642071) and next prime (642077).

It can be written as a sum of positive squares in only one way, i.e., 628849 + 13225 = 793^2 + 115^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 642074.

It is not an unprimeable number, because it can be changed into a prime (642071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160517 + ... + 160520.

2⁶⁴²⁰⁷⁴ is an apocalyptic number.

642074 is a deficient number, since it is larger than the sum of its proper divisors (321040).

642074 is a wasteful number, since it uses less digits than its factorization.

642074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321039.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 642074 is about 801.2952015331. The cubic root of 642074 is about 86.2703767581.

The spelling of 642074 in words is "six hundred forty-two thousand, seventy-four".