72772142 has 4 divisors (see below), whose sum is σ = 109158216. Its totient is φ = 36386070.

The previous prime is 72772123. The next prime is 72772153. The reversal of 72772142 is 24127727.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24127727 = 13 ⋅1855979.

It is a junction number, because it is equal to n+sod(n) for n = 72772099 and 72772108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18193034 + ... + 18193037.

It is an arithmetic number, because the mean of its divisors is an integer number (27289554).

Almost surely, 2^72772142 is an apocalyptic number.

72772142 is a deficient number, since it is larger than the sum of its proper divisors (36386074).

72772142 is a wasteful number, since it uses less digits than its factorization.

72772142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36386073.

The product of its digits is 10976, while the sum is 32.

The square root of 72772142 is about 8530.6589428953. The cubic root of 72772142 is about 417.4986281284.

Adding to 72772142 its reverse (24127727), we get a palindrome (96899869).

The spelling of 72772142 in words is "seventy-two million, seven hundred seventy-two thousand, one hundred forty-two".