72106154 has 4 divisors (see below), whose sum is σ = 108159234. Its totient is φ = 36053076.

The previous prime is 72106079. The next prime is 72106169. The reversal of 72106154 is 45160127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45160127 = 139 ⋅324893.

It can be written as a sum of positive squares in only one way, i.e., 55905529 + 16200625 = 7477^2 + 4025^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18026537 + ... + 18026540.

Almost surely, 2^72106154 is an apocalyptic number.

72106154 is a deficient number, since it is larger than the sum of its proper divisors (36053080).

72106154 is a wasteful number, since it uses less digits than its factorization.

72106154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36053079.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 72106154 is about 8491.5342547740. The cubic root of 72106154 is about 416.2211171932.

The spelling of 72106154 in words is "seventy-two million, one hundred six thousand, one hundred fifty-four".