405004134 has 16 divisors (see below), whose sum is σ = 810383472. Its totient is φ = 134938848.

The previous prime is 405004129. The next prime is 405004139. The reversal of 405004134 is 431400504.

It is an interprime number because it is at equal distance from previous prime (405004129) and next prime (405004139).

It is a self number, because there is not a number n which added to its sum of digits gives 405004134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405004139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469 + ... + 28464.

It is an arithmetic number, because the mean of its divisors is an integer number (50648967).

Almost surely, 2^405004134 is an apocalyptic number.

405004134 is an abundant number, since it is smaller than the sum of its proper divisors (405379338).

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

405004134 is a wasteful number, since it uses less digits than its factorization.

405004134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31271.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 405004134 is about 20124.7145072918. The cubic root of 405004134 is about 739.8661396537.

Adding to 405004134 its reverse (431400504), we get a palindrome (836404638).

The spelling of 405004134 in words is "four hundred five million, four thousand, one hundred thirty-four".