542187405 has 16 divisors (see below), whose sum is σ = 963888960. Its totient is φ = 289166544.

The previous prime is 542187397. The next prime is 542187407. The reversal of 542187405 is 504781245.

It is not a de Polignac number, because 542187405 - 2³ = 542187397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 542187405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542187407) 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, 2007967 + ... + 2008236.

It is an arithmetic number, because the mean of its divisors is an integer number (60243060).

Almost surely, 2^542187405 is an apocalyptic number.

It is an amenable number.

542187405 is a deficient number, since it is larger than the sum of its proper divisors (421701555).

542187405 is a wasteful number, since it uses less digits than its factorization.

542187405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4016217 (or 4016211 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The square root of 542187405 is about 23284.9179727995. The cubic root of 542187405 is about 815.4233463691.

The spelling of 542187405 in words is "five hundred forty-two million, one hundred eighty-seven thousand, four hundred five".