72070105 has 4 divisors (see below), whose sum is σ = 86484132. Its totient is φ = 57656080.

The previous prime is 72070081. The next prime is 72070111. The reversal of 72070105 is 50107027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50107027 = 2393 ⋅20939.

It can be written as a sum of positive squares in 2 ways, for example, as 22127616 + 49942489 = 4704^2 + 7067^2 .

It is not a de Polignac number, because 72070105 - 2⁵ = 72070073 is a prime.

It is a super-2 number, since 2×72070105² = 10388200069422050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7207006 + ... + 7207015.

It is an arithmetic number, because the mean of its divisors is an integer number (21621033).

Almost surely, 2^72070105 is an apocalyptic number.

It is an amenable number.

72070105 is a deficient number, since it is larger than the sum of its proper divisors (14414027).

72070105 is a wasteful number, since it uses less digits than its factorization.

72070105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14414026.

The product of its (nonzero) digits is 490, while the sum is 22.

The square root of 72070105 is about 8489.4113459061. The cubic root of 72070105 is about 416.1517432893.

The spelling of 72070105 in words is "seventy-two million, seventy thousand, one hundred five".