72071452 has 12 divisors (see below), whose sum is σ = 126194656. Its totient is φ = 36015840.

The previous prime is 72071429. The next prime is 72071459. The reversal of 72071452 is 25417027.

It is a self number, because there is not a number n which added to its sum of digits gives 72071452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72071459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5752 + ... + 13312.

Almost surely, 2^72071452 is an apocalyptic number.

It is an amenable number.

72071452 is a deficient number, since it is larger than the sum of its proper divisors (54123204).

72071452 is a wasteful number, since it uses less digits than its factorization.

72071452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9948 (or 9946 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 72071452 is about 8489.4906796580. The cubic root of 72071452 is about 416.1543359173.

Adding to 72071452 its reverse (25417027), we get a palindrome (97488479).

The spelling of 72071452 in words is "seventy-two million, seventy-one thousand, four hundred fifty-two".