263542 has 4 divisors (see below), whose sum is σ = 395316. Its totient is φ = 131770.

The previous prime is 263537. The next prime is 263561. The reversal of 263542 is 245362.

It is a happy number.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 2¹⁷ + 6 + 5³ + 3⁵ + 4⁵ + 2¹⁷ .

It is a congruent number.

It is an unprimeable number.

263542 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65884 + ... + 65887.

It is an arithmetic number, because the mean of its divisors is an integer number (98829).

2²⁶³⁵⁴² is an apocalyptic number.

263542 is a deficient number, since it is larger than the sum of its proper divisors (131774).

263542 is a wasteful number, since it uses less digits than its factorization.

263542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131773.

The product of its digits is 1440, while the sum is 22.

The square root of 263542 is about 513.3634190318. The cubic root of 263542 is about 64.1135678860.

The spelling of 263542 in words is "two hundred sixty-three thousand, five hundred forty-two".