402605143 has 4 divisors (see below), whose sum is σ = 402668928. Its totient is φ = 402541360.

The previous prime is 402605131. The next prime is 402605171. The reversal of 402605143 is 341506204.

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 402605143 - 2¹³ = 402596951 is a prime.

It is a super-3 number, since 3×402605143³ (a number of 27 digits) contains 333 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 (402605123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21238 + ... + 35443.

It is an arithmetic number, because the mean of its divisors is an integer number (100667232).

Almost surely, 2^402605143 is an apocalyptic number.

402605143 is a deficient number, since it is larger than the sum of its proper divisors (63785).

402605143 is an equidigital number, since it uses as much as digits as its factorization.

402605143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63784.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 402605143 is about 20065.0228756411. The cubic root of 402605143 is about 738.4024111232.

The spelling of 402605143 in words is "four hundred two million, six hundred five thousand, one hundred forty-three".