2142236745 has 48 divisors (see below), whose sum is σ = 4090200192. Its totient is φ = 1028551680.

The previous prime is 2142236729. The next prime is 2142236753. The reversal of 2142236745 is 5476322412.

It is not a de Polignac number, because 2142236745 - 2⁴ = 2142236729 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29977 + ... + 71993.

It is an arithmetic number, because the mean of its divisors is an integer number (85212504).

Almost surely, 2^2142236745 is an apocalyptic number.

It is an amenable number.

2142236745 is a deficient number, since it is larger than the sum of its proper divisors (1947963447).

2142236745 is a wasteful number, since it uses less digits than its factorization.

2142236745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42142 (or 42139 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 2142236745 is about 46284.3034407995. The cubic root of 2142236745 is about 1289.1075583280.

It can be divided in two parts, 21422367 and 45, that added together give a palindrome (21422412).

The spelling of 2142236745 in words is "two billion, one hundred forty-two million, two hundred thirty-six thousand, seven hundred forty-five".