542493 has 24 divisors (see below), whose sum is σ = 915200. Its totient is φ = 303264.

The previous prime is 542489. The next prime is 542497. The reversal of 542493 is 394245.

It is an interprime number because it is at equal distance from previous prime (542489) and next prime (542497).

It is not a de Polignac number, because 542493 - 2² = 542489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542497) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4923 + ... + 5031.

2⁵⁴²⁴⁹³ is an apocalyptic number.

It is an amenable number.

542493 is a deficient number, since it is larger than the sum of its proper divisors (372707).

542493 is a wasteful number, since it uses less digits than its factorization.

542493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 198 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 542493 is about 736.5412412078. The cubic root of 542493 is about 81.5576517574.

It can be divided in two parts, 542 and 493, that added together give a triangular number (1035 = T₄₅).

The spelling of 542493 in words is "five hundred forty-two thousand, four hundred ninety-three".