402441 has 16 divisors (see below), whose sum is σ = 612864. Its totient is φ = 232704.

The previous prime is 402419. The next prime is 402443. The reversal of 402441 is 144204.

It is not a de Polignac number, because 402441 - 2⁷ = 402313 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 402441.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402441.

It is not an unprimeable number, because it can be changed into a prime (402443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360 + ... + 966.

It is an arithmetic number, because the mean of its divisors is an integer number (38304).

2⁴⁰²⁴⁴¹ is an apocalyptic number.

It is an amenable number.

402441 is a deficient number, since it is larger than the sum of its proper divisors (210423).

402441 is a wasteful number, since it uses less digits than its factorization.

402441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 402441 is about 634.3823768044. The cubic root of 402441 is about 73.8302048055.

Adding to 402441 its reverse (144204), we get a palindrome (546645).

The spelling of 402441 in words is "four hundred two thousand, four hundred forty-one", and thus it is an iban number.