42143405 has 16 divisors (see below), whose sum is σ = 51701760. Its totient is φ = 32968128.

The previous prime is 42143401. The next prime is 42143417. The reversal of 42143405 is 50434124.

It is a cyclic number.

It is not a de Polignac number, because 42143405 - 2² = 42143401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42143401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109844 + ... + 110226.

It is an arithmetic number, because the mean of its divisors is an integer number (3231360).

Almost surely, 2^42143405 is an apocalyptic number.

It is an amenable number.

42143405 is a deficient number, since it is larger than the sum of its proper divisors (9558355).

42143405 is a wasteful number, since it uses less digits than its factorization.

42143405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820.

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

The square root of 42143405 is about 6491.7952062584. The cubic root of 42143405 is about 347.9978338043.

Adding to 42143405 its reverse (50434124), we get a palindrome (92577529).

The spelling of 42143405 in words is "forty-two million, one hundred forty-three thousand, four hundred five".