72156003 has 8 divisors (see below), whose sum is σ = 99311616. Its totient is φ = 46552200.

The previous prime is 72155971. The next prime is 72156011. The reversal of 72156003 is 30065127.

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

It is not a de Polignac number, because 72156003 - 2⁵ = 72155971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72156013) 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 7 ways as a sum of consecutive naturals, for example, 387843 + ... + 388028.

It is an arithmetic number, because the mean of its divisors is an integer number (12413952).

Almost surely, 2^72156003 is an apocalyptic number.

72156003 is a deficient number, since it is larger than the sum of its proper divisors (27155613).

72156003 is a wasteful number, since it uses less digits than its factorization.

72156003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775905.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 72156003 is about 8494.4689651561. The cubic root of 72156003 is about 416.3170101967.

The spelling of 72156003 in words is "seventy-two million, one hundred fifty-six thousand, three".