72103285 has 8 divisors (see below), whose sum is σ = 86579640. Its totient is φ = 57645504.

The previous prime is 72103277. The next prime is 72103289. The reversal of 72103285 is 58230127.

It can be written as a sum of positive squares in 4 ways, for example, as 1425636 + 70677649 = 1194^2 + 8407^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 72103285 - 2³ = 72103277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72103289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6211 + ... + 13519.

It is an arithmetic number, because the mean of its divisors is an integer number (10822455).

Almost surely, 2^72103285 is an apocalyptic number.

It is an amenable number.

72103285 is a deficient number, since it is larger than the sum of its proper divisors (14476355).

72103285 is a wasteful number, since it uses less digits than its factorization.

72103285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9287.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 72103285 is about 8491.3653201355. The cubic root of 72103285 is about 416.2155968404.

The spelling of 72103285 in words is "seventy-two million, one hundred three thousand, two hundred eighty-five".