405142043 has 4 divisors (see below), whose sum is σ = 410692008. Its totient is φ = 399592080.

The previous prime is 405142039. The next prime is 405142051. The reversal of 405142043 is 340241504.

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 405142043 - 2² = 405142039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405142063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2774873 + ... + 2775018.

It is an arithmetic number, because the mean of its divisors is an integer number (102673002).

Almost surely, 2^405142043 is an apocalyptic number.

405142043 is a deficient number, since it is larger than the sum of its proper divisors (5549965).

405142043 is an equidigital number, since it uses as much as digits as its factorization.

405142043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5549964.

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

The square root of 405142043 is about 20128.1405748271. The cubic root of 405142043 is about 739.9501080315.

Adding to 405142043 its reverse (340241504), we get a palindrome (745383547).

The spelling of 405142043 in words is "four hundred five million, one hundred forty-two thousand, forty-three".