542123540 has 72 divisors (see below), whose sum is σ = 1382236800. Its totient is φ = 174924288.

The previous prime is 542123539. The next prime is 542123551. The reversal of 542123540 is 45321245.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33761 + ... + 47159.

Almost surely, 2^542123540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 542123540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (691118400).

542123540 is an abundant number, since it is smaller than the sum of its proper divisors (840113260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

542123540 is a wasteful number, since it uses less digits than its factorization.

542123540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13449 (or 13430 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 542123540 is about 23283.5465511593. The cubic root of 542123540 is about 815.3913284995.

Adding to 542123540 its reverse (45321245), we get a palindrome (587444785).

The spelling of 542123540 in words is "five hundred forty-two million, one hundred twenty-three thousand, five hundred forty".