72143412 has 48 divisors (see below), whose sum is σ = 184246272. Its totient is φ = 21789280.

The previous prime is 72143411. The next prime is 72143413. The reversal of 72143412 is 21434127.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72143411) and next prime (72143413).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72143411) 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 in 15 ways as a sum of consecutive naturals, for example, 49843 + ... + 51269.

It is an arithmetic number, because the mean of its divisors is an integer number (3838464).

Almost surely, 2^72143412 is an apocalyptic number.

It is an amenable number.

72143412 is an abundant number, since it is smaller than the sum of its proper divisors (112102860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72143412 is a wasteful number, since it uses less digits than its factorization.

72143412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828 (or 1826 counting only the distinct ones).

The product of its digits is 1344, while the sum is 24.

The square root of 72143412 is about 8493.7278035030. The cubic root of 72143412 is about 416.2927934433.

Adding to 72143412 its reverse (21434127), we get a palindrome (93577539).

The spelling of 72143412 in words is "seventy-two million, one hundred forty-three thousand, four hundred twelve".