72537445 has 8 divisors (see below), whose sum is σ = 87579936. Its totient is φ = 57673296.

The previous prime is 72537433. The next prime is 72537461. The reversal of 72537445 is 54473527.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72537445 - 2¹³ = 72529253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 43687 + ... + 45316.

It is an arithmetic number, because the mean of its divisors is an integer number (10947492).

Almost surely, 2^72537445 is an apocalyptic number.

It is an amenable number.

72537445 is a deficient number, since it is larger than the sum of its proper divisors (15042491).

72537445 is a wasteful number, since it uses less digits than its factorization.

72537445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89171.

The product of its digits is 117600, while the sum is 37.

The square root of 72537445 is about 8516.8917452319. The cubic root of 72537445 is about 417.0493206524.

The spelling of 72537445 in words is "seventy-two million, five hundred thirty-seven thousand, four hundred forty-five".