542186685 has 24 divisors (see below), whose sum is σ = 949103064. Its totient is φ = 286300800.

The previous prime is 542186681. The next prime is 542186693. The reversal of 542186685 is 586681245.

It can be written as a sum of positive squares in 4 ways, for example, as 81054009 + 461132676 = 9003^2 + 21474^2 .

It is not a de Polignac number, because 542186685 - 2² = 542186681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 542186685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542186681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55102 + ... + 64191.

It is an arithmetic number, because the mean of its divisors is an integer number (39545961).

Almost surely, 2^542186685 is an apocalyptic number.

It is an amenable number.

542186685 is a deficient number, since it is larger than the sum of its proper divisors (406916379).

542186685 is a wasteful number, since it uses less digits than its factorization.

542186685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119405 (or 119402 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 542186685 is about 23284.9025121429. The cubic root of 542186685 is about 815.4229854206.

The spelling of 542186685 in words is "five hundred forty-two million, one hundred eighty-six thousand, six hundred eighty-five".