42665263 has 2 divisors, whose sum is σ = 42665264. Its totient is φ = 42665262.

The previous prime is 42665251. The next prime is 42665281. The reversal of 42665263 is 36256624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42665263 - 2²⁵ = 9110831 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42665243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21332631 + 21332632.

It is an arithmetic number, because the mean of its divisors is an integer number (21332632).

Almost surely, 2^42665263 is an apocalyptic number.

42665263 is a deficient number, since it is larger than the sum of its proper divisors (1).

42665263 is an equidigital number, since it uses as much as digits as its factorization.

42665263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 34.

The square root of 42665263 is about 6531.8652006911. The cubic root of 42665263 is about 349.4283539282.

The spelling of 42665263 in words is "forty-two million, six hundred sixty-five thousand, two hundred sixty-three".