402771 has 4 divisors (see below), whose sum is σ = 537032. Its totient is φ = 268512.

The previous prime is 402769. The next prime is 402797. The reversal of 402771 is 177204.

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

It is not a de Polignac number, because 402771 - 2¹ = 402769 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402771.

It is not an unprimeable number, because it can be changed into a prime (402751) 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, 67126 + ... + 67131.

It is an arithmetic number, because the mean of its divisors is an integer number (134258).

2⁴⁰²⁷⁷¹ is an apocalyptic number.

402771 is a deficient number, since it is larger than the sum of its proper divisors (134261).

402771 is a wasteful number, since it uses less digits than its factorization.

402771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134260.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 402771 is about 634.6424190046. The cubic root of 402771 is about 73.8503794490.

Adding to 402771 its reverse (177204), we get a palindrome (579975).

The spelling of 402771 in words is "four hundred two thousand, seven hundred seventy-one", and thus it is an iban number.