72105015 has 8 divisors (see below), whose sum is σ = 115368048. Its totient is φ = 38456000.

The previous prime is 72104987. The next prime is 72105017. The reversal of 72105015 is 51050127.

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

It is not a de Polignac number, because 72105015 - 2⁶ = 72104951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72104982 and 72105000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72105017) by changing a digit.

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, 2403486 + ... + 2403515.

It is an arithmetic number, because the mean of its divisors is an integer number (14421006).

Almost surely, 2^72105015 is an apocalyptic number.

72105015 is a deficient number, since it is larger than the sum of its proper divisors (43263033).

72105015 is a wasteful number, since it uses less digits than its factorization.

72105015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4807009.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 72105015 is about 8491.4671877126. The cubic root of 72105015 is about 416.2189256172.

The spelling of 72105015 in words is "seventy-two million, one hundred five thousand, fifteen".