273542421 has 4 divisors (see below), whose sum is σ = 364723232. Its totient is φ = 182361612.

The previous prime is 273542387. The next prime is 273542453. The reversal of 273542421 is 124245372.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 273542421 - 2⁷ = 273542293 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 (273542921) 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, 45590401 + ... + 45590406.

It is an arithmetic number, because the mean of its divisors is an integer number (91180808).

Almost surely, 2^273542421 is an apocalyptic number.

It is an amenable number.

273542421 is a deficient number, since it is larger than the sum of its proper divisors (91180811).

273542421 is an equidigital number, since it uses as much as digits as its factorization.

273542421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91180810.

The product of its digits is 13440, while the sum is 30.

The square root of 273542421 is about 16539.1179027178. The cubic root of 273542421 is about 649.1447695133.

Adding to 273542421 its reverse (124245372), we get a palindrome (397787793).

The spelling of 273542421 in words is "two hundred seventy-three million, five hundred forty-two thousand, four hundred twenty-one".