72851542 has 4 divisors (see below), whose sum is σ = 109277316. Its totient is φ = 36425770.

The previous prime is 72851539. The next prime is 72851543. The reversal of 72851542 is 24515827.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 72851498 and 72851507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72851543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18212884 + ... + 18212887.

It is an arithmetic number, because the mean of its divisors is an integer number (27319329).

Almost surely, 2^72851542 is an apocalyptic number.

72851542 is a deficient number, since it is larger than the sum of its proper divisors (36425774).

72851542 is a wasteful number, since it uses less digits than its factorization.

72851542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36425773.

The product of its digits is 22400, while the sum is 34.

The square root of 72851542 is about 8535.3114764489. The cubic root of 72851542 is about 417.6504139689.

The spelling of 72851542 in words is "seventy-two million, eight hundred fifty-one thousand, five hundred forty-two".