42109601 has 2 divisors, whose sum is σ = 42109602. Its totient is φ = 42109600.

The previous prime is 42109597. The next prime is 42109609. The reversal of 42109601 is 10690124.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35224225 + 6885376 = 5935^2 + 2624^2 .

It is a cyclic number.

It is not a de Polignac number, because 42109601 - 2² = 42109597 is a prime.

It is not a weakly prime, because it can be changed into another prime (42109609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21054800 + 21054801.

It is an arithmetic number, because the mean of its divisors is an integer number (21054801).

Almost surely, 2^42109601 is an apocalyptic number.

It is an amenable number.

42109601 is a deficient number, since it is larger than the sum of its proper divisors (1).

42109601 is an equidigital number, since it uses as much as digits as its factorization.

42109601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 42109601 is about 6489.1910898046. The cubic root of 42109601 is about 347.9047637619.

Adding to 42109601 its reverse (10690124), we get a palindrome (52799725).

The spelling of 42109601 in words is "forty-two million, one hundred nine thousand, six hundred one".