405550542 has 16 divisors (see below), whose sum is σ = 824849280. Its totient is φ = 132892152.

The previous prime is 405550517. The next prime is 405550547. The reversal of 405550542 is 245055504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405550547) 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, 572458 + ... + 573165.

It is an arithmetic number, because the mean of its divisors is an integer number (51553080).

Almost surely, 2^405550542 is an apocalyptic number.

405550542 is an abundant number, since it is smaller than the sum of its proper divisors (419298738).

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

405550542 is a wasteful number, since it uses less digits than its factorization.

405550542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145687.

The product of its (nonzero) digits is 20000, while the sum is 30.

The square root of 405550542 is about 20138.2854781632. The cubic root of 405550542 is about 740.1987182412.

The spelling of 405550542 in words is "four hundred five million, five hundred fifty thousand, five hundred forty-two".