542540291 has 4 divisors (see below), whose sum is σ = 545111784. Its totient is φ = 539968800.

The previous prime is 542540281. The next prime is 542540293. The reversal of 542540291 is 192045245.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 542540291 - 2²⁶ = 475431427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542540293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285430 + ... + 1285851.

It is an arithmetic number, because the mean of its divisors is an integer number (136277946).

Almost surely, 2^542540291 is an apocalyptic number.

542540291 is a deficient number, since it is larger than the sum of its proper divisors (2571493).

542540291 is a wasteful number, since it uses less digits than its factorization.

542540291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571492.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 542540291 is about 23292.4943061064. The cubic root of 542540291 is about 815.6002157655.

The spelling of 542540291 in words is "five hundred forty-two million, five hundred forty thousand, two hundred ninety-one".