542091249 has 12 divisors (see below), whose sum is σ = 894880896. Its totient is φ = 309766392.

The previous prime is 542091241. The next prime is 542091281. The reversal of 542091249 is 942190245.

542091249 is a `hidden beast` number, since 542 + 0 + 91 + 24 + 9 = 666.

It is not a de Polignac number, because 542091249 - 2³ = 542091241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (542091241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4302249 + ... + 4302374.

It is an arithmetic number, because the mean of its divisors is an integer number (74573408).

Almost surely, 2^542091249 is an apocalyptic number.

It is an amenable number.

542091249 is a deficient number, since it is larger than the sum of its proper divisors (352789647).

542091249 is a wasteful number, since it uses less digits than its factorization.

542091249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8604636 (or 8604633 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 542091249 is about 23282.8531112491. The cubic root of 542091249 is about 815.3751388783.

It can be divided in two parts, 5420 and 91249, that added together give a palindrome (96669).

The spelling of 542091249 in words is "five hundred forty-two million, ninety-one thousand, two hundred forty-nine".