42544361 has 2 divisors, whose sum is σ = 42544362. Its totient is φ = 42544360.

The previous prime is 42544357. The next prime is 42544373. The reversal of 42544361 is 16344524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26584336 + 15960025 = 5156^2 + 3995^2 .

It is a cyclic number.

It is not a de Polignac number, because 42544361 - 2² = 42544357 is a prime.

It is not a weakly prime, because it can be changed into another prime (42544261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21272180 + 21272181.

It is an arithmetic number, because the mean of its divisors is an integer number (21272181).

Almost surely, 2^42544361 is an apocalyptic number.

It is an amenable number.

42544361 is a deficient number, since it is larger than the sum of its proper divisors (1).

42544361 is an equidigital number, since it uses as much as digits as its factorization.

42544361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 29.

The square root of 42544361 is about 6522.6038512238. The cubic root of 42544361 is about 349.0979793486.

Adding to 42544361 its reverse (16344524), we get a palindrome (58888885).

The spelling of 42544361 in words is "forty-two million, five hundred forty-four thousand, three hundred sixty-one".