542849 has 4 divisors (see below), whose sum is σ = 571440. Its totient is φ = 514260.

The previous prime is 542837. The next prime is 542873. The reversal of 542849 is 948245.

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 a cyclic number.

It is not a de Polignac number, because 542849 - 2¹⁶ = 477313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14267 + ... + 14304.

It is an arithmetic number, because the mean of its divisors is an integer number (142860).

2⁵⁴²⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

542849 is a deficient number, since it is larger than the sum of its proper divisors (28591).

542849 is a wasteful number, since it uses less digits than its factorization.

542849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28590.

The product of its digits is 11520, while the sum is 32.

The square root of 542849 is about 736.7828716793. The cubic root of 542849 is about 81.5754880400.

The spelling of 542849 in words is "five hundred forty-two thousand, eight hundred forty-nine".