42641801 has 2 divisors, whose sum is σ = 42641802. Its totient is φ = 42641800.

The previous prime is 42641783. The next prime is 42641813. The reversal of 42641801 is 10814624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28944400 + 13697401 = 5380^2 + 3701^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42641801 is a prime.

It is a Chen prime.

It is equal to p_2584223 and since 42641801 and 2584223 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (42641821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21320900 + 21320901.

It is an arithmetic number, because the mean of its divisors is an integer number (21320901).

Almost surely, 2^42641801 is an apocalyptic number.

It is an amenable number.

42641801 is a deficient number, since it is larger than the sum of its proper divisors (1).

42641801 is an equidigital number, since it uses as much as digits as its factorization.

42641801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 42641801 is about 6530.0689889158. The cubic root of 42641801 is about 349.3642909513.

The spelling of 42641801 in words is "forty-two million, six hundred forty-one thousand, eight hundred one".