42142369 has 4 divisors (see below), whose sum is σ = 42200596. Its totient is φ = 42084144.

The previous prime is 42142363. The next prime is 42142381. The reversal of 42142369 is 96324124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31979025 + 10163344 = 5655^2 + 3188^2 .

It is a cyclic number.

It is not a de Polignac number, because 42142369 - 2⁷ = 42142241 is a prime.

It is a super-2 number, since 2×42142369² = 3551958529864322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42142369.

It is not an unprimeable number, because it can be changed into a prime (42142363) 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, 28014 + ... + 29479.

It is an arithmetic number, because the mean of its divisors is an integer number (10550149).

Almost surely, 2^42142369 is an apocalyptic number.

It is an amenable number.

42142369 is a deficient number, since it is larger than the sum of its proper divisors (58227).

42142369 is an equidigital number, since it uses as much as digits as its factorization.

42142369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58226.

The product of its digits is 10368, while the sum is 31.

The square root of 42142369 is about 6491.7154127395. The cubic root of 42142369 is about 347.9949822018.

The spelling of 42142369 in words is "forty-two million, one hundred forty-two thousand, three hundred sixty-nine".