542690 has 8 divisors (see below), whose sum is σ = 976860. Its totient is φ = 217072.

The previous prime is 542687. The next prime is 542693. The reversal of 542690 is 96245.

It is an interprime number because it is at equal distance from previous prime (542687) and next prime (542693).

It can be written as a sum of positive squares in 2 ways, for example, as 528529 + 14161 = 727^2 + 119^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×542690² = 589024872200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (542693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27125 + ... + 27144.

2⁵⁴²⁶⁹⁰ is an apocalyptic number.

542690 is a deficient number, since it is larger than the sum of its proper divisors (434170).

542690 is a wasteful number, since it uses less digits than its factorization.

542690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54276.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 542690 is about 736.6749622459. The cubic root of 542690 is about 81.5675227991.

It can be divided in two parts, 54 and 2690, that added together give a cube (2744 = 14³).

The spelling of 542690 in words is "five hundred forty-two thousand, six hundred ninety".