72134445 has 8 divisors (see below), whose sum is σ = 115415136. Its totient is φ = 38471696.

The previous prime is 72134441. The next prime is 72134449. The reversal of 72134445 is 54443127.

It is an interprime number because it is at equal distance from previous prime (72134441) and next prime (72134449).

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 72134445 - 2² = 72134441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72134441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2404467 + ... + 2404496.

It is an arithmetic number, because the mean of its divisors is an integer number (14426892).

Almost surely, 2^72134445 is an apocalyptic number.

It is an amenable number.

72134445 is a deficient number, since it is larger than the sum of its proper divisors (43280691).

72134445 is a wasteful number, since it uses less digits than its factorization.

72134445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4808971.

The product of its digits is 13440, while the sum is 30.

The square root of 72134445 is about 8493.1999270004. The cubic root of 72134445 is about 416.2755451502.

The spelling of 72134445 in words is "seventy-two million, one hundred thirty-four thousand, four hundred forty-five".