72126402 has 8 divisors (see below), whose sum is σ = 144252816. Its totient is φ = 24042132.

The previous prime is 72126391. The next prime is 72126403. The reversal of 72126402 is 20462127.

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

72126402 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (72126403) 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, 6010528 + ... + 6010539.

It is an arithmetic number, because the mean of its divisors is an integer number (18031602).

Almost surely, 2^72126402 is an apocalyptic number.

72126402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72126402 is a wasteful number, since it uses less digits than its factorization.

72126402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12021072.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 72126402 is about 8492.7264173527. The cubic root of 72126402 is about 416.2600729826.

Adding to 72126402 its reverse (20462127), we get a palindrome (92588529).

The spelling of 72126402 in words is "seventy-two million, one hundred twenty-six thousand, four hundred two".