72145726 has 8 divisors (see below), whose sum is σ = 108997560. Its totient is φ = 35813208.

The previous prime is 72145721. The next prime is 72145729. The reversal of 72145726 is 62754127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 72145691 and 72145700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72145721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129481 + ... + 130036.

It is an arithmetic number, because the mean of its divisors is an integer number (13624695).

Almost surely, 2^72145726 is an apocalyptic number.

72145726 is a deficient number, since it is larger than the sum of its proper divisors (36851834).

72145726 is a wasteful number, since it uses less digits than its factorization.

72145726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259658.

The product of its digits is 23520, while the sum is 34.

The square root of 72145726 is about 8493.8640205739. The cubic root of 72145726 is about 416.2972442596.

The spelling of 72145726 in words is "seventy-two million, one hundred forty-five thousand, seven hundred twenty-six".