542420551 has 4 divisors (see below), whose sum is σ = 542867472. Its totient is φ = 541973632.

The previous prime is 542420537. The next prime is 542420573. The reversal of 542420551 is 155024245.

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 542420551 - 2⁵ = 542420519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542420651) 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 3 ways as a sum of consecutive naturals, for example, 221635 + ... + 224068.

It is an arithmetic number, because the mean of its divisors is an integer number (135716868).

Almost surely, 2^542420551 is an apocalyptic number.

542420551 is a deficient number, since it is larger than the sum of its proper divisors (446921).

542420551 is a wasteful number, since it uses less digits than its factorization.

542420551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446920.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 542420551 is about 23289.9238083769. The cubic root of 542420551 is about 815.5402096812.

Adding to 542420551 its reverse (155024245), we get a palindrome (697444796).

The spelling of 542420551 in words is "five hundred forty-two million, four hundred twenty thousand, five hundred fifty-one".