402142005 has 48 divisors (see below), whose sum is σ = 741177216. Its totient is φ = 201252480.

The previous prime is 402142003. The next prime is 402142009. The reversal of 402142005 is 500241204.

It is not a de Polignac number, because 402142005 - 2¹ = 402142003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402142001) 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 47 ways as a sum of consecutive naturals, for example, 51190 + ... + 58520.

It is an arithmetic number, because the mean of its divisors is an integer number (15441192).

Almost surely, 2^402142005 is an apocalyptic number.

402142005 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

402142005 is a deficient number, since it is larger than the sum of its proper divisors (339035211).

402142005 is a wasteful number, since it uses less digits than its factorization.

402142005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7418 (or 7415 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 402142005 is about 20053.4786259143. The cubic root of 402142005 is about 738.1191613609.

Adding to 402142005 its reverse (500241204), we get a palindrome (902383209).

The spelling of 402142005 in words is "four hundred two million, one hundred forty-two thousand, five".