542125221 has 16 divisors (see below), whose sum is σ = 809859648. Its totient is φ = 319680000.

The previous prime is 542125187. The next prime is 542125267. The reversal of 542125221 is 122521245.

It is not a de Polignac number, because 542125221 - 2¹⁰ = 542124197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 542125191 and 542125200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542125321) 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, 220780 + ... + 223221.

It is an arithmetic number, because the mean of its divisors is an integer number (50616228).

Almost surely, 2^542125221 is an apocalyptic number.

It is an amenable number.

542125221 is a deficient number, since it is larger than the sum of its proper divisors (267734427).

542125221 is a wasteful number, since it uses less digits than its factorization.

542125221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444052.

The product of its digits is 1600, while the sum is 24.

The square root of 542125221 is about 23283.5826495838. The cubic root of 542125221 is about 815.3921712787.

Adding to 542125221 its reverse (122521245), we get a palindrome (664646466).

The spelling of 542125221 in words is "five hundred forty-two million, one hundred twenty-five thousand, two hundred twenty-one".