72021002 has 8 divisors (see below), whose sum is σ = 108987876. Its totient is φ = 35691712.

The previous prime is 72020989. The next prime is 72021013. The reversal of 72021002 is 20012027.

It can be written as a sum of positive squares in 2 ways, for example, as 47210641 + 24810361 = 6871^2 + 4981^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159113 + ... + 159564.

Almost surely, 2^72021002 is an apocalyptic number.

72021002 is a deficient number, since it is larger than the sum of its proper divisors (36966874).

72021002 is a wasteful number, since it uses less digits than its factorization.

72021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318792.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 72021002 is about 8486.5188387230. The cubic root of 72021002 is about 416.0572106044.

Adding to 72021002 its reverse (20012027), we get a palindrome (92033029).

The spelling of 72021002 in words is "seventy-two million, twenty-one thousand, two".