72162143 has 2 divisors, whose sum is σ = 72162144. Its totient is φ = 72162142.

The previous prime is 72162137. The next prime is 72162169. The reversal of 72162143 is 34126127.

It is an a-pointer prime, because the next prime (72162169) can be obtained adding 72162143 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72162143 - 2¹⁰ = 72161119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72162443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36081071 + 36081072.

It is an arithmetic number, because the mean of its divisors is an integer number (36081072).

Almost surely, 2^72162143 is an apocalyptic number.

72162143 is a deficient number, since it is larger than the sum of its proper divisors (1).

72162143 is an equidigital number, since it uses as much as digits as its factorization.

72162143 is an odious number, because the sum of its binary digits is odd.

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

The square root of 72162143 is about 8494.8303691127. The cubic root of 72162143 is about 416.3288184725.

The spelling of 72162143 in words is "seventy-two million, one hundred sixty-two thousand, one hundred forty-three".