42240641 has 2 divisors, whose sum is σ = 42240642. Its totient is φ = 42240640.

The previous prime is 42240623. The next prime is 42240659. The reversal of 42240641 is 14604224.

It is a balanced prime because it is at equal distance from previous prime (42240623) and next prime (42240659).

It can be written as a sum of positive squares in only one way, i.e., 35058241 + 7182400 = 5921^2 + 2680^2 .

It is a cyclic number.

It is not a de Polignac number, because 42240641 - 2¹⁴ = 42224257 is a prime.

It is not a weakly prime, because it can be changed into another prime (42240691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21120320 + 21120321.

It is an arithmetic number, because the mean of its divisors is an integer number (21120321).

Almost surely, 2^42240641 is an apocalyptic number.

It is an amenable number.

42240641 is a deficient number, since it is larger than the sum of its proper divisors (1).

42240641 is an equidigital number, since it uses as much as digits as its factorization.

42240641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 42240641 is about 6499.2800370503. The cubic root of 42240641 is about 348.2652692929.

Adding to 42240641 its reverse (14604224), we get a palindrome (56844865).

The spelling of 42240641 in words is "forty-two million, two hundred forty thousand, six hundred forty-one".