402045 has 24 divisors (see below), whose sum is σ = 749664. Its totient is φ = 183456.

The previous prime is 402043. The next prime is 402049. The reversal of 402045 is 540204.

It is not a de Polignac number, because 402045 - 2¹ = 402043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 462 + ... + 1008.

It is an arithmetic number, because the mean of its divisors is an integer number (31236).

2⁴⁰²⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

402045 is a deficient number, since it is larger than the sum of its proper divisors (347619).

402045 is a wasteful number, since it uses less digits than its factorization.

402045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 402045 is about 634.0701853896. The cubic root of 402045 is about 73.8059806700.

Adding to 402045 its reverse (540204), we get a palindrome (942249).

The spelling of 402045 in words is "four hundred two thousand, forty-five".