538492121 has 4 divisors (see below), whose sum is σ = 543257652. Its totient is φ = 533726592.

The previous prime is 538492111. The next prime is 538492133. The reversal of 538492121 is 121294835.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121294835 = 5 ⋅24258967.

It can be written as a sum of positive squares in 2 ways, for example, as 197683600 + 340808521 = 14060^2 + 18461^2 .

It is a cyclic number.

It is not a de Polignac number, because 538492121 - 2⁶ = 538492057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (538492111) 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, 2382596 + ... + 2382821.

It is an arithmetic number, because the mean of its divisors is an integer number (135814413).

Almost surely, 2^538492121 is an apocalyptic number.

It is an amenable number.

538492121 is a deficient number, since it is larger than the sum of its proper divisors (4765531).

538492121 is a wasteful number, since it uses less digits than its factorization.

538492121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4765530.

The product of its digits is 17280, while the sum is 35.

The square root of 538492121 is about 23205.4330060872. The cubic root of 538492121 is about 813.5666129458.

The spelling of 538492121 in words is "five hundred thirty-eight million, four hundred ninety-two thousand, one hundred twenty-one".