72054505 has 4 divisors (see below), whose sum is σ = 86465412. Its totient is φ = 57643600.

The previous prime is 72054497. The next prime is 72054529. The reversal of 72054505 is 50545027.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17338896 + 54715609 = 4164^2 + 7397^2 .

It is not a de Polignac number, because 72054505 - 2³ = 72054497 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, 7205446 + ... + 7205455.

It is an arithmetic number, because the mean of its divisors is an integer number (21616353).

Almost surely, 2^72054505 is an apocalyptic number.

It is an amenable number.

72054505 is a deficient number, since it is larger than the sum of its proper divisors (14410907).

72054505 is a wasteful number, since it uses less digits than its factorization.

72054505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14410906.

The product of its (nonzero) digits is 7000, while the sum is 28.

The square root of 72054505 is about 8488.4925045617. The cubic root of 72054505 is about 416.1217149548.

It can be divided in two parts, 720 and 54505, that added together give a square (55225 = 235²).

The spelling of 72054505 in words is "seventy-two million, fifty-four thousand, five hundred five".