642034 has 4 divisors (see below), whose sum is σ = 963054. Its totient is φ = 321016.

The previous prime is 642013. The next prime is 642049. The reversal of 642034 is 430246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 430246 = 2 ⋅215123.

It can be written as a sum of positive squares in only one way, i.e., 442225 + 199809 = 665^2 + 447^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160507 + ... + 160510.

2⁶⁴²⁰³⁴ is an apocalyptic number.

642034 is a deficient number, since it is larger than the sum of its proper divisors (321020).

642034 is a wasteful number, since it uses less digits than its factorization.

642034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321019.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 642034 is about 801.2702415540. The cubic root of 642034 is about 86.2685852269.

The spelling of 642034 in words is "six hundred forty-two thousand, thirty-four".