402111 has 16 divisors (see below), whose sum is σ = 609120. Its totient is φ = 262080.

The previous prime is 402107. The next prime is 402131. The reversal of 402111 is 111204.

It is a happy number.

It is not a de Polignac number, because 402111 - 2² = 402107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 402093 and 402102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402131) 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 15 ways as a sum of consecutive naturals, for example, 1291 + ... + 1571.

It is an arithmetic number, because the mean of its divisors is an integer number (38070).

2⁴⁰²¹¹¹ is an apocalyptic number.

402111 is a deficient number, since it is larger than the sum of its proper divisors (207009).

402111 is a wasteful number, since it uses less digits than its factorization.

402111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 402111 is about 634.1222279656. The cubic root of 402111 is about 73.8100191302.

Adding to 402111 its reverse (111204), we get a palindrome (513315).

The spelling of 402111 in words is "four hundred two thousand, one hundred eleven", and thus it is an iban number.