542138505 has 16 divisors (see below), whose sum is σ = 875530944. Its totient is φ = 286437440.

The previous prime is 542138501. The next prime is 542138549. The reversal of 542138505 is 505831245.

It is not a de Polignac number, because 542138505 - 2² = 542138501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (542138501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167286 + ... + 170495.

It is an arithmetic number, because the mean of its divisors is an integer number (54720684).

Almost surely, 2^542138505 is an apocalyptic number.

It is an amenable number.

542138505 is a deficient number, since it is larger than the sum of its proper divisors (333392439).

542138505 is a wasteful number, since it uses less digits than its factorization.

542138505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337896.

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 542138505 is about 23283.8679132141. The cubic root of 542138505 is about 815.3988312290.

The spelling of 542138505 in words is "five hundred forty-two million, one hundred thirty-eight thousand, five hundred five".