72770122 has 4 divisors (see below), whose sum is σ = 109155186. Its totient is φ = 36385060.

The previous prime is 72770119. The next prime is 72770141. The reversal of 72770122 is 22107727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22107727 = 617 ⋅35831.

It can be written as a sum of positive squares in only one way, i.e., 37711881 + 35058241 = 6141^2 + 5921^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18192529 + ... + 18192532.

Almost surely, 2^72770122 is an apocalyptic number.

72770122 is a deficient number, since it is larger than the sum of its proper divisors (36385064).

72770122 is a wasteful number, since it uses less digits than its factorization.

72770122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36385063.

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 72770122 is about 8530.5405455926. The cubic root of 72770122 is about 417.4947651345.

Adding to 72770122 its reverse (22107727), we get a palindrome (94877849).

The spelling of 72770122 in words is "seventy-two million, seven hundred seventy thousand, one hundred twenty-two".