542187406 has 4 divisors (see below), whose sum is σ = 813281112. Its totient is φ = 271093702.

The previous prime is 542187397. The next prime is 542187407. The reversal of 542187406 is 604781245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 604781245 = 5 ⋅120956249.

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 as a sum of consecutive naturals, namely, 135546850 + ... + 135546853.

It is an arithmetic number, because the mean of its divisors is an integer number (203320278).

Almost surely, 2^542187406 is an apocalyptic number.

542187406 is a deficient number, since it is larger than the sum of its proper divisors (271093706).

542187406 is a wasteful number, since it uses less digits than its factorization.

542187406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271093705.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 542187406 is about 23284.9179942726. The cubic root of 542187406 is about 815.4233468704.

The spelling of 542187406 in words is "five hundred forty-two million, one hundred eighty-seven thousand, four hundred six".