72106245 has 12 divisors (see below), whose sum is σ = 124984236. Its totient is φ = 38456640.

The previous prime is 72106241. The next prime is 72106247. The reversal of 72106245 is 54260127.

It can be written as a sum of positive squares in 2 ways, for example, as 12152196 + 59954049 = 3486^2 + 7743^2 .

It is not a de Polignac number, because 72106245 - 2² = 72106241 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72106241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 801136 + ... + 801225.

It is an arithmetic number, because the mean of its divisors is an integer number (10415353).

Almost surely, 2^72106245 is an apocalyptic number.

It is an amenable number.

72106245 is a deficient number, since it is larger than the sum of its proper divisors (52877991).

72106245 is a wasteful number, since it uses less digits than its factorization.

72106245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602372 (or 1602369 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 72106245 is about 8491.5396130502. The cubic root of 72106245 is about 416.2212922874.

The spelling of 72106245 in words is "seventy-two million, one hundred six thousand, two hundred forty-five".