42431129 has 4 divisors (see below), whose sum is σ = 45695076. Its totient is φ = 39167184.

The previous prime is 42431117. The next prime is 42431141. The reversal of 42431129 is 92113424.

42431129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (42431117) and next prime (42431141).

It can be written as a sum of positive squares in 2 ways, for example, as 16216729 + 26214400 = 4027^2 + 5120^2 .

It is a cyclic number.

It is not a de Polignac number, because 42431129 - 2¹⁶ = 42365593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42431098 and 42431107.

It is not an unprimeable number, because it can be changed into a prime (42433129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1631954 + ... + 1631979.

It is an arithmetic number, because the mean of its divisors is an integer number (11423769).

Almost surely, 2^42431129 is an apocalyptic number.

It is an amenable number.

42431129 is a deficient number, since it is larger than the sum of its proper divisors (3263947).

42431129 is a wasteful number, since it uses less digits than its factorization.

42431129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3263946.

The product of its digits is 1728, while the sum is 26.

The square root of 42431129 is about 6513.9180989632. The cubic root of 42431129 is about 348.7879955862.

The spelling of 42431129 in words is "forty-two million, four hundred thirty-one thousand, one hundred twenty-nine".