542749249 has 8 divisors (see below), whose sum is σ = 621727488. Its totient is φ = 464131680.

The previous prime is 542749247. The next prime is 542749313. The reversal of 542749249 is 942947245.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 542749249 - 2¹ = 542749247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 542749199 and 542749208.

It is not an unprimeable number, because it can be changed into a prime (542749247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86932 + ... + 92965.

It is an arithmetic number, because the mean of its divisors is an integer number (77715936).

Almost surely, 2^542749249 is an apocalyptic number.

It is an amenable number.

542749249 is a deficient number, since it is larger than the sum of its proper divisors (78978239).

542749249 is a wasteful number, since it uses less digits than its factorization.

542749249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180335.

The product of its digits is 725760, while the sum is 46.

The square root of 542749249 is about 23296.9793964797. The cubic root of 542749249 is about 815.7049111019.

The spelling of 542749249 in words is "five hundred forty-two million, seven hundred forty-nine thousand, two hundred forty-nine".