42321749 has 2 divisors, whose sum is σ = 42321750. Its totient is φ = 42321748.

The previous prime is 42321731. The next prime is 42321767. The reversal of 42321749 is 94712324.

42321749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (42321731) and next prime (42321767).

It can be written as a sum of positive squares in only one way, i.e., 42315025 + 6724 = 6505^2 + 82^2 .

It is a cyclic number.

It is not a de Polignac number, because 42321749 - 2²⁰ = 41273173 is a prime.

It is a super-2 number, since 2×42321749² = 3582260876838002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42321049) 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 as a sum of consecutive naturals, namely, 21160874 + 21160875.

It is an arithmetic number, because the mean of its divisors is an integer number (21160875).

Almost surely, 2^42321749 is an apocalyptic number.

It is an amenable number.

42321749 is a deficient number, since it is larger than the sum of its proper divisors (1).

42321749 is an equidigital number, since it uses as much as digits as its factorization.

42321749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 42321749 is about 6505.5168126752. The cubic root of 42321749 is about 348.4880329520.

The spelling of 42321749 in words is "forty-two million, three hundred twenty-one thousand, seven hundred forty-nine".