72005045 has 16 divisors (see below), whose sum is σ = 98910720. Its totient is φ = 49294464.

The previous prime is 72005029. The next prime is 72005051. The reversal of 72005045 is 54050027.

It is a cyclic number.

It is not a de Polignac number, because 72005045 - 2⁴ = 72005029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72005045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27044 + ... + 29586.

It is an arithmetic number, because the mean of its divisors is an integer number (6181920).

Almost surely, 2^72005045 is an apocalyptic number.

It is an amenable number.

72005045 is a deficient number, since it is larger than the sum of its proper divisors (26905675).

72005045 is a wasteful number, since it uses less digits than its factorization.

72005045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3364.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 72005045 is about 8485.5786485071. The cubic root of 72005045 is about 416.0264810713.

The spelling of 72005045 in words is "seventy-two million, five thousand, forty-five".