72686126 has 4 divisors (see below), whose sum is σ = 109029192. Its totient is φ = 36343062.

The previous prime is 72686087. The next prime is 72686129. The reversal of 72686126 is 62168627.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62168627 = 19 ⋅3272033.

It is a self number, because there is not a number n which added to its sum of digits gives 72686126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72686129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18171530 + ... + 18171533.

It is an arithmetic number, because the mean of its divisors is an integer number (27257298).

Almost surely, 2^72686126 is an apocalyptic number.

72686126 is a deficient number, since it is larger than the sum of its proper divisors (36343066).

72686126 is a wasteful number, since it uses less digits than its factorization.

72686126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36343065.

The product of its digits is 48384, while the sum is 38.

The square root of 72686126 is about 8525.6158721819. The cubic root of 72686126 is about 417.3340701014.

The spelling of 72686126 in words is "seventy-two million, six hundred eighty-six thousand, one hundred twenty-six".