263642 has 8 divisors (see below), whose sum is σ = 402132. Its totient is φ = 129600.

The previous prime is 263621. The next prime is 263647. The reversal of 263642 is 246362.

It can be written as a sum of positive squares in 2 ways, for example, as 249001 + 14641 = 499^2 + 121^2 .

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

It is not an unprimeable number, because it can be changed into a prime (263647) 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, 959 + ... + 1202.

2²⁶³⁶⁴² is an apocalyptic number.

263642 is a deficient number, since it is larger than the sum of its proper divisors (138490).

263642 is a wasteful number, since it uses less digits than its factorization.

263642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224.

The product of its digits is 1728, while the sum is 23.

The square root of 263642 is about 513.4608066834. The cubic root of 263642 is about 64.1216760763.

The spelling of 263642 in words is "two hundred sixty-three thousand, six hundred forty-two".