402102143 has 4 divisors (see below), whose sum is σ = 402236568. Its totient is φ = 401967720.

The previous prime is 402102133. The next prime is 402102157. The reversal of 402102143 is 341201204.

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

It is a cyclic number.

It is not a de Polignac number, because 402102143 - 2²⁰ = 401053567 is a prime.

It is a super-2 number, since 2×402102143² = 323372266810384898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402102133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62621 + ... + 68742.

It is an arithmetic number, because the mean of its divisors is an integer number (100559142).

Almost surely, 2^402102143 is an apocalyptic number.

402102143 is a deficient number, since it is larger than the sum of its proper divisors (134425).

402102143 is a wasteful number, since it uses less digits than its factorization.

402102143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134424.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 402102143 is about 20052.4847088833. The cubic root of 402102143 is about 738.0947720674.

Adding to 402102143 its reverse (341201204), we get a palindrome (743303347).

The spelling of 402102143 in words is "four hundred two million, one hundred two thousand, one hundred forty-three".