2172425842 has 4 divisors (see below), whose sum is σ = 3258638766. Its totient is φ = 1086212920.

The previous prime is 2172425821. The next prime is 2172425891. The reversal of 2172425842 is 2485242712.

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., 2171653201 + 772641 = 46601^2 + 879^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543106459 + ... + 543106462.

Almost surely, 2^2172425842 is an apocalyptic number.

2172425842 is a deficient number, since it is larger than the sum of its proper divisors (1086212924).

2172425842 is a wasteful number, since it uses less digits than its factorization.

2172425842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086212923.

The product of its digits is 71680, while the sum is 37.

The square root of 2172425842 is about 46609.2892243596. The cubic root of 2172425842 is about 1295.1348412337.

The spelling of 2172425842 in words is "two billion, one hundred seventy-two million, four hundred twenty-five thousand, eight hundred forty-two".