72540106 has 4 divisors (see below), whose sum is σ = 108810162. Its totient is φ = 36270052.

The previous prime is 72540089. The next prime is 72540113. The reversal of 72540106 is 60104527.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 52693081 + 19847025 = 7259^2 + 4455^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18135025 + ... + 18135028.

Almost surely, 2^72540106 is an apocalyptic number.

72540106 is a deficient number, since it is larger than the sum of its proper divisors (36270056).

72540106 is a wasteful number, since it uses less digits than its factorization.

72540106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36270055.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 72540106 is about 8517.0479627627. The cubic root of 72540106 is about 417.0544203389.

The spelling of 72540106 in words is "seventy-two million, five hundred forty thousand, one hundred six".