542650685 has 4 divisors (see below), whose sum is σ = 651180828. Its totient is φ = 434120544.

The previous prime is 542650649. The next prime is 542650739. The reversal of 542650685 is 586056245.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79798489 + 462852196 = 8933^2 + 21514^2 .

It is a cyclic number.

It is not a de Polignac number, because 542650685 - 2²⁰ = 541602109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54265064 + ... + 54265073.

It is an arithmetic number, because the mean of its divisors is an integer number (162795207).

Almost surely, 2^542650685 is an apocalyptic number.

It is an amenable number.

542650685 is a deficient number, since it is larger than the sum of its proper divisors (108530143).

542650685 is a wasteful number, since it uses less digits than its factorization.

542650685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108530142.

The product of its (nonzero) digits is 288000, while the sum is 41.

The square root of 542650685 is about 23294.8639188985. The cubic root of 542650685 is about 815.6555304064.

The spelling of 542650685 in words is "five hundred forty-two million, six hundred fifty thousand, six hundred eighty-five".