642273146 has 4 divisors (see below), whose sum is σ = 963409722. Its totient is φ = 321136572.

The previous prime is 642273139. The next prime is 642273197. The reversal of 642273146 is 641372246.

642273146 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 can be written as a sum of positive squares in only one way, i.e., 505125625 + 137147521 = 22475^2 + 11711^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160568285 + ... + 160568288.

Almost surely, 2^642273146 is an apocalyptic number.

642273146 is a deficient number, since it is larger than the sum of its proper divisors (321136576).

642273146 is a wasteful number, since it uses less digits than its factorization.

642273146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321136575.

The product of its digits is 48384, while the sum is 35.

The square root of 642273146 is about 25343.1084518060. The cubic root of 642273146 is about 862.7929505748.

The spelling of 642273146 in words is "six hundred forty-two million, two hundred seventy-three thousand, one hundred forty-six".