42431437 has 4 divisors (see below), whose sum is σ = 43894620. Its totient is φ = 40968256.

The previous prime is 42431407. The next prime is 42431447. The reversal of 42431437 is 73413424.

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 7986276 + 34445161 = 2826^2 + 5869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42431437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42431407) 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, 731548 + ... + 731605.

It is an arithmetic number, because the mean of its divisors is an integer number (10973655).

Almost surely, 2^42431437 is an apocalyptic number.

It is an amenable number.

42431437 is a deficient number, since it is larger than the sum of its proper divisors (1463183).

42431437 is a wasteful number, since it uses less digits than its factorization.

42431437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463182.

The product of its digits is 8064, while the sum is 28.

The square root of 42431437 is about 6513.9417406053. The cubic root of 42431437 is about 348.7888395142.

The spelling of 42431437 in words is "forty-two million, four hundred thirty-one thousand, four hundred thirty-seven".