405126172 has 48 divisors (see below), whose sum is σ = 821812320. Its totient is φ = 172972800.

The previous prime is 405126121. The next prime is 405126173. The reversal of 405126172 is 271621504.

It is a self number, because there is not a number n which added to its sum of digits gives 405126172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405126173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42922 + ... + 51502.

It is an arithmetic number, because the mean of its divisors is an integer number (17121090).

Almost surely, 2^405126172 is an apocalyptic number.

It is an amenable number.

405126172 is an abundant number, since it is smaller than the sum of its proper divisors (416686148).

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

405126172 is a wasteful number, since it uses less digits than its factorization.

405126172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8662 (or 8660 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 405126172 is about 20127.7463219308. The cubic root of 405126172 is about 739.9404456577.

Adding to 405126172 its reverse (271621504), we get a palindrome (676747676).

The spelling of 405126172 in words is "four hundred five million, one hundred twenty-six thousand, one hundred seventy-two".