263402 has 4 divisors (see below), whose sum is σ = 395106. Its totient is φ = 131700.

The previous prime is 263401. The next prime is 263411. The reversal of 263402 is 204362.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204362 = 2 ⋅102181.

It can be written as a sum of positive squares in only one way, i.e., 231361 + 32041 = 481^2 + 179^2 .

It is a super-2 number, since 2×263402² = 138761227208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (263401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65849 + ... + 65852.

2²⁶³⁴⁰² is an apocalyptic number.

263402 is a deficient number, since it is larger than the sum of its proper divisors (131704).

263402 is a wasteful number, since it uses less digits than its factorization.

263402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131703.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 263402 is about 513.2270452733. The cubic root of 263402 is about 64.1022129731.

Adding to 263402 its reverse (204362), we get a palindrome (467764).

The spelling of 263402 in words is "two hundred sixty-three thousand, four hundred two".