72142871 has 2 divisors, whose sum is σ = 72142872. Its totient is φ = 72142870.

The previous prime is 72142813. The next prime is 72142901. The reversal of 72142871 is 17824127.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72142871 - 2¹⁰ = 72141847 is a prime.

It is a super-2 number, since 2×72142871² = 10409187672245282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72142171) by changing a digit.

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 as a sum of consecutive naturals, namely, 36071435 + 36071436.

It is an arithmetic number, because the mean of its divisors is an integer number (36071436).

Almost surely, 2^72142871 is an apocalyptic number.

72142871 is a deficient number, since it is larger than the sum of its proper divisors (1).

72142871 is an equidigital number, since it uses as much as digits as its factorization.

72142871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6272, while the sum is 32.

The square root of 72142871 is about 8493.6959564138. The cubic root of 72142871 is about 416.2917528541.

Adding to 72142871 its reverse (17824127), we get a palindrome (89966998).

The spelling of 72142871 in words is "seventy-two million, one hundred forty-two thousand, eight hundred seventy-one".