402271 has 4 divisors (see below), whose sum is σ = 425952. Its totient is φ = 378592.

The previous prime is 402263. The next prime is 402277. The reversal of 402271 is 172204.

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

It is a cyclic number.

It is not a de Polignac number, because 402271 - 2³ = 402263 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11815 + ... + 11848.

It is an arithmetic number, because the mean of its divisors is an integer number (106488).

2⁴⁰²²⁷¹ is an apocalyptic number.

402271 is a deficient number, since it is larger than the sum of its proper divisors (23681).

402271 is a wasteful number, since it uses less digits than its factorization.

402271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23680.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 402271 is about 634.2483740618. The cubic root of 402271 is about 73.8198075029.

Adding to 402271 its reverse (172204), we get a palindrome (574475).

The spelling of 402271 in words is "four hundred two thousand, two hundred seventy-one", and thus it is an iban number.