72122305 has 4 divisors (see below), whose sum is σ = 86546772. Its totient is φ = 57697840.

The previous prime is 72122293. The next prime is 72122327. The reversal of 72122305 is 50322127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50322127 = 19 ⋅2648533.

It can be written as a sum of positive squares in 2 ways, for example, as 45589504 + 26532801 = 6752^2 + 5151^2 .

It is not a de Polignac number, because 72122305 - 2¹³ = 72114113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7212226 + ... + 7212235.

It is an arithmetic number, because the mean of its divisors is an integer number (21636693).

Almost surely, 2^72122305 is an apocalyptic number.

It is an amenable number.

72122305 is a deficient number, since it is larger than the sum of its proper divisors (14424467).

72122305 is a wasteful number, since it uses less digits than its factorization.

72122305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14424466.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 72122305 is about 8492.4852075232. The cubic root of 72122305 is about 416.2521912187.

It can be divided in two parts, 72122 and 305, that added together give a palindrome (72427).

The spelling of 72122305 in words is "seventy-two million, one hundred twenty-two thousand, three hundred five".