72143487 has 16 divisors (see below), whose sum is σ = 115101280. Its totient is φ = 44395776.

The previous prime is 72143483. The next prime is 72143507. The reversal of 72143487 is 78434127.

It is a happy number.

It is not a de Polignac number, because 72143487 - 2² = 72143483 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 (72143483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102418 + ... + 103119.

It is an arithmetic number, because the mean of its divisors is an integer number (7193830).

Almost surely, 2^72143487 is an apocalyptic number.

72143487 is a deficient number, since it is larger than the sum of its proper divisors (42957793).

72143487 is a wasteful number, since it uses less digits than its factorization.

72143487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205559 (or 205553 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 72143487 is about 8493.7322185244. The cubic root of 72143487 is about 416.2929377020.

It can be divided in two parts, 7214 and 3487, that added together give a palindrome (10701).

The spelling of 72143487 in words is "seventy-two million, one hundred forty-three thousand, four hundred eighty-seven".