72254509 has 4 divisors (see below), whose sum is σ = 72303840. Its totient is φ = 72205180.

The previous prime is 72254503. The next prime is 72254513. The reversal of 72254509 is 90545227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72254509 - 2¹¹ = 72252461 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 (72254503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22399 + ... + 25420.

It is an arithmetic number, because the mean of its divisors is an integer number (18075960).

Almost surely, 2^72254509 is an apocalyptic number.

It is an amenable number.

72254509 is a deficient number, since it is larger than the sum of its proper divisors (49331).

72254509 is a wasteful number, since it uses less digits than its factorization.

72254509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49330.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 72254509 is about 8500.2652311560. The cubic root of 72254509 is about 416.5063734003.

The spelling of 72254509 in words is "seventy-two million, two hundred fifty-four thousand, five hundred nine".