72142267 has 4 divisors (see below), whose sum is σ = 74092096. Its totient is φ = 70192440.

The previous prime is 72142249. The next prime is 72142307. The reversal of 72142267 is 76224127.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72142267 - 2¹⁹ = 71617979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72142207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 974859 + ... + 974932.

It is an arithmetic number, because the mean of its divisors is an integer number (18523024).

Almost surely, 2^72142267 is an apocalyptic number.

72142267 is a deficient number, since it is larger than the sum of its proper divisors (1949829).

72142267 is a wasteful number, since it uses less digits than its factorization.

72142267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949828.

The product of its digits is 9408, while the sum is 31.

The square root of 72142267 is about 8493.6604005576. The cubic root of 72142267 is about 416.2905910811.

The spelling of 72142267 in words is "seventy-two million, one hundred forty-two thousand, two hundred sixty-seven".