72126203 has 4 divisors (see below), whose sum is σ = 72222240. Its totient is φ = 72030168.

The previous prime is 72126199. The next prime is 72126211. The reversal of 72126203 is 30262127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30262127 = 7 ⋅4323161.

It is a cyclic number.

It is not a de Polignac number, because 72126203 - 2² = 72126199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72126293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46883 + ... + 48396.

It is an arithmetic number, because the mean of its divisors is an integer number (18055560).

Almost surely, 2^72126203 is an apocalyptic number.

72126203 is a deficient number, since it is larger than the sum of its proper divisors (96037).

72126203 is an equidigital number, since it uses as much as digits as its factorization.

72126203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96036.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 72126203 is about 8492.7147014368. The cubic root of 72126203 is about 416.2596901555.

The spelling of 72126203 in words is "seventy-two million, one hundred twenty-six thousand, two hundred three".