402252143 has 12 divisors (see below), whose sum is σ = 416636088. Its totient is φ = 388153920.

The previous prime is 402252091. The next prime is 402252157. The reversal of 402252143 is 341252204.

It is a happy number.

It is not a de Polignac number, because 402252143 - 2⁸ = 402251887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402252163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 340013 + ... + 341193.

It is an arithmetic number, because the mean of its divisors is an integer number (34719674).

Almost surely, 2^402252143 is an apocalyptic number.

402252143 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

402252143 is a deficient number, since it is larger than the sum of its proper divisors (14383945).

402252143 is an equidigital number, since it uses as much as digits as its factorization.

402252143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402 (or 1313 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 402252143 is about 20056.2245450135. The cubic root of 402252143 is about 738.1865401696.

It can be divided in two parts, 4022 and 52143, that added together give a palindrome (56165).

The spelling of 402252143 in words is "four hundred two million, two hundred fifty-two thousand, one hundred forty-three".