42244739 has 2 divisors, whose sum is σ = 42244740. Its totient is φ = 42244738.

The previous prime is 42244717. The next prime is 42244747. The reversal of 42244739 is 93744224.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42244739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42244699 and 42244708.

It is not a weakly prime, because it can be changed into another prime (42244789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21122369 + 21122370.

It is an arithmetic number, because the mean of its divisors is an integer number (21122370).

Almost surely, 2^42244739 is an apocalyptic number.

42244739 is a deficient number, since it is larger than the sum of its proper divisors (1).

42244739 is an equidigital number, since it uses as much as digits as its factorization.

42244739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 35.

The square root of 42244739 is about 6499.5952950934. The cubic root of 42244739 is about 348.2765313137.

The spelling of 42244739 in words is "forty-two million, two hundred forty-four thousand, seven hundred thirty-nine".