402143345 has 4 divisors (see below), whose sum is σ = 482572020. Its totient is φ = 321714672.

The previous prime is 402143323. The next prime is 402143359. The reversal of 402143345 is 543341204.

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

It can be written as a sum of positive squares in 2 ways, for example, as 80156209 + 321987136 = 8953^2 + 17944^2 .

It is a cyclic number.

It is not a de Polignac number, because 402143345 - 2⁶ = 402143281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40214330 + ... + 40214339.

It is an arithmetic number, because the mean of its divisors is an integer number (120643005).

Almost surely, 2^402143345 is an apocalyptic number.

It is an amenable number.

402143345 is a deficient number, since it is larger than the sum of its proper divisors (80428675).

402143345 is an equidigital number, since it uses as much as digits as its factorization.

402143345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80428674.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 402143345 is about 20053.5120365486. The cubic root of 402143345 is about 738.1199812028.

Adding to 402143345 its reverse (543341204), we get a palindrome (945484549).

The spelling of 402143345 in words is "four hundred two million, one hundred forty-three thousand, three hundred forty-five".