42431069 has 2 divisors, whose sum is σ = 42431070. Its totient is φ = 42431068.

The previous prime is 42431063. The next prime is 42431087. The reversal of 42431069 is 96013424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24900100 + 17530969 = 4990^2 + 4187^2 .

It is a cyclic number.

It is not a de Polignac number, because 42431069 - 2²⁰ = 41382493 is a prime.

It is a super-2 number, since 2×42431069² = 3600791232965522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_2572238 and since 42431069 and 2572238 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42431063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21215534 + 21215535.

It is an arithmetic number, because the mean of its divisors is an integer number (21215535).

Almost surely, 2^42431069 is an apocalyptic number.

It is an amenable number.

42431069 is a deficient number, since it is larger than the sum of its proper divisors (1).

42431069 is an equidigital number, since it uses as much as digits as its factorization.

42431069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 42431069 is about 6513.9134934385. The cubic root of 42431069 is about 348.7878311842.

The spelling of 42431069 in words is "forty-two million, four hundred thirty-one thousand, sixty-nine".