42204749 has 2 divisors, whose sum is σ = 42204750. Its totient is φ = 42204748.

The previous prime is 42204677. The next prime is 42204781. The reversal of 42204749 is 94740224.

It is an a-pointer prime, because the next prime (42204781) can be obtained adding 42204749 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39375625 + 2829124 = 6275^2 + 1682^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42204749 is a prime.

It is a Chen prime.

It is equal to p_2559308 and since 42204749 and 2559308 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 (42204049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21102374 + 21102375.

It is an arithmetic number, because the mean of its divisors is an integer number (21102375).

Almost surely, 2^42204749 is an apocalyptic number.

It is an amenable number.

42204749 is a deficient number, since it is larger than the sum of its proper divisors (1).

42204749 is an equidigital number, since it uses as much as digits as its factorization.

42204749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 42204749 is about 6496.5182213244. The cubic root of 42204749 is about 348.1666006582.

The spelling of 42204749 in words is "forty-two million, two hundred four thousand, seven hundred forty-nine".