402136143 has 4 divisors (see below), whose sum is σ = 536181528. Its totient is φ = 268090760.

The previous prime is 402136099. The next prime is 402136157. The reversal of 402136143 is 341631204.

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 402136143 - 2⁹ = 402135631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402135143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67022688 + ... + 67022693.

It is an arithmetic number, because the mean of its divisors is an integer number (134045382).

Almost surely, 2^402136143 is an apocalyptic number.

402136143 is a deficient number, since it is larger than the sum of its proper divisors (134045385).

402136143 is a wasteful number, since it uses less digits than its factorization.

402136143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134045384.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 402136143 is about 20053.3324662012. The cubic root of 402136143 is about 738.1155748372.

Adding to 402136143 its reverse (341631204), we get a palindrome (743767347).

The spelling of 402136143 in words is "four hundred two million, one hundred thirty-six thousand, one hundred forty-three".