72121463 has 8 divisors (see below), whose sum is σ = 78997680. Its totient is φ = 65537920.

The previous prime is 72121447. The next prime is 72121477. The reversal of 72121463 is 36412127.

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 72121463 - 2⁴ = 72121447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72121433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72653 + ... + 73638.

It is an arithmetic number, because the mean of its divisors is an integer number (9874710).

Almost surely, 2^72121463 is an apocalyptic number.

72121463 is a deficient number, since it is larger than the sum of its proper divisors (6876217).

72121463 is a wasteful number, since it uses less digits than its factorization.

72121463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146337.

The product of its digits is 2016, while the sum is 26.

The square root of 72121463 is about 8492.4356341394. The cubic root of 72121463 is about 416.2505713513.

The spelling of 72121463 in words is "seventy-two million, one hundred twenty-one thousand, four hundred sixty-three".