72105402 has 8 divisors (see below), whose sum is σ = 144210816. Its totient is φ = 24035132.

The previous prime is 72105401. The next prime is 72105419. The reversal of 72105402 is 20450127.

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

72105402 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (72105401) 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, 6008778 + ... + 6008789.

It is an arithmetic number, because the mean of its divisors is an integer number (18026352).

Almost surely, 2^72105402 is an apocalyptic number.

72105402 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.

72105402 is a wasteful number, since it uses less digits than its factorization.

72105402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12017572.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 72105402 is about 8491.4899752635. The cubic root of 72105402 is about 416.2196702554.

Adding to 72105402 its reverse (20450127), we get a palindrome (92555529).

The spelling of 72105402 in words is "seventy-two million, one hundred five thousand, four hundred two".