72051305 has 8 divisors (see below), whose sum is σ = 86550144. Its totient is φ = 57582000.

The previous prime is 72051293. The next prime is 72051313. The reversal of 72051305 is 50315027.

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

It is not a de Polignac number, because 72051305 - 2¹⁰ = 72050281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1601 + ... + 12110.

It is an arithmetic number, because the mean of its divisors is an integer number (10818768).

Almost surely, 2^72051305 is an apocalyptic number.

It is an amenable number.

72051305 is a deficient number, since it is larger than the sum of its proper divisors (14498839).

72051305 is a wasteful number, since it uses less digits than its factorization.

72051305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14767.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 72051305 is about 8488.3040119920. The cubic root of 72051305 is about 416.1155547608.

It can be divided in two parts, 720 and 51305, that added together give a palindrome (52025).

The spelling of 72051305 in words is "seventy-two million, fifty-one thousand, three hundred five".