72506134 has 4 divisors (see below), whose sum is σ = 108759204. Its totient is φ = 36253066.

The previous prime is 72506131. The next prime is 72506201. The reversal of 72506134 is 43160527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43160527 = 1433 ⋅30119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72506131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18126532 + ... + 18126535.

It is an arithmetic number, because the mean of its divisors is an integer number (27189801).

Almost surely, 2^72506134 is an apocalyptic number.

72506134 is a deficient number, since it is larger than the sum of its proper divisors (36253070).

72506134 is a wasteful number, since it uses less digits than its factorization.

72506134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36253069.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 72506134 is about 8515.0533762273. The cubic root of 72506134 is about 416.9893051639.

The spelling of 72506134 in words is "seventy-two million, five hundred six thousand, one hundred thirty-four".