405126642 has 16 divisors (see below), whose sum is σ = 811187712. Its totient is φ = 134886480.

The previous prime is 405126641. The next prime is 405126649. The reversal of 405126642 is 246621504.

It is not an unprimeable number, because it can be changed into a prime (405126641) 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, 33234 + ... + 43757.

It is an arithmetic number, because the mean of its divisors is an integer number (50699232).

Almost surely, 2^405126642 is an apocalyptic number.

405126642 is an abundant number, since it is smaller than the sum of its proper divisors (406061070).

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

405126642 is a wasteful number, since it uses less digits than its factorization.

405126642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77873.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 405126642 is about 20127.7579973528. The cubic root of 405126642 is about 739.9407318006.

The spelling of 405126642 in words is "four hundred five million, one hundred twenty-six thousand, six hundred forty-two".