72273145 has 8 divisors (see below), whose sum is σ = 99117504. Its totient is φ = 49558704.

The previous prime is 72273127. The next prime is 72273167. The reversal of 72273145 is 54137227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72273145 - 2²¹ = 70175993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1032439 + ... + 1032508.

It is an arithmetic number, because the mean of its divisors is an integer number (12389688).

Almost surely, 2^72273145 is an apocalyptic number.

It is an amenable number.

72273145 is a deficient number, since it is larger than the sum of its proper divisors (26844359).

72273145 is a wasteful number, since it uses less digits than its factorization.

72273145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064959.

The product of its digits is 11760, while the sum is 31.

The square root of 72273145 is about 8501.3613615703. The cubic root of 72273145 is about 416.5421789882.

The spelling of 72273145 in words is "seventy-two million, two hundred seventy-three thousand, one hundred forty-five".