72102106 has 4 divisors (see below), whose sum is σ = 108153162. Its totient is φ = 36051052.

The previous prime is 72102077. The next prime is 72102113. The reversal of 72102106 is 60120127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60120127 = 2953 ⋅20359.

It can be written as a sum of positive squares in only one way, i.e., 70980625 + 1121481 = 8425^2 + 1059^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 18025525 + ... + 18025528.

Almost surely, 2^72102106 is an apocalyptic number.

72102106 is a deficient number, since it is larger than the sum of its proper divisors (36051056).

72102106 is a wasteful number, since it uses less digits than its factorization.

72102106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36051055.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 72102106 is about 8491.2958963871. The cubic root of 72102106 is about 416.2133282389.

It can be divided in two parts, 7210 and 2106, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 72102106 in words is "seventy-two million, one hundred two thousand, one hundred six".