72546559 has 4 divisors (see below), whose sum is σ = 73915416. Its totient is φ = 71177704.

The previous prime is 72546553. The next prime is 72546563. The reversal of 72546559 is 95564527.

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 72546559 - 2⁵ = 72546527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72546553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684349 + ... + 684454.

It is an arithmetic number, because the mean of its divisors is an integer number (18478854).

Almost surely, 2^72546559 is an apocalyptic number.

72546559 is a deficient number, since it is larger than the sum of its proper divisors (1368857).

72546559 is a wasteful number, since it uses less digits than its factorization.

72546559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368856.

The product of its digits is 378000, while the sum is 43.

The square root of 72546559 is about 8517.4267827789. The cubic root of 72546559 is about 417.0667867043.

The spelling of 72546559 in words is "seventy-two million, five hundred forty-six thousand, five hundred fifty-nine".