542636247 has 8 divisors (see below), whose sum is σ = 724938480. Its totient is φ = 361045760.

The previous prime is 542636233. The next prime is 542636249. The reversal of 542636247 is 742636245.

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 542636247 - 2⁴ = 542636231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542636249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176154 + ... + 179207.

It is an arithmetic number, because the mean of its divisors is an integer number (90617310).

Almost surely, 2^542636247 is an apocalyptic number.

542636247 is a deficient number, since it is larger than the sum of its proper divisors (182302233).

542636247 is a wasteful number, since it uses less digits than its factorization.

542636247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355873.

The product of its digits is 241920, while the sum is 39.

The square root of 542636247 is about 23294.5540201997. The cubic root of 542636247 is about 815.6482964471.

The spelling of 542636247 in words is "five hundred forty-two million, six hundred thirty-six thousand, two hundred forty-seven".