42861601 has 2 divisors, whose sum is σ = 42861602. Its totient is φ = 42861600.

The previous prime is 42861569. The next prime is 42861617. The reversal of 42861601 is 10616824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35700625 + 7160976 = 5975^2 + 2676^2 .

It is a cyclic number.

It is not a de Polignac number, because 42861601 - 2⁵ = 42861569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42861601.

It is not a weakly prime, because it can be changed into another prime (42861661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21430800 + 21430801.

It is an arithmetic number, because the mean of its divisors is an integer number (21430801).

Almost surely, 2^42861601 is an apocalyptic number.

It is an amenable number.

42861601 is a deficient number, since it is larger than the sum of its proper divisors (1).

42861601 is an equidigital number, since it uses as much as digits as its factorization.

42861601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 42861601 is about 6546.8771945104. The cubic root of 42861601 is about 349.9635363373.

The spelling of 42861601 in words is "forty-two million, eight hundred sixty-one thousand, six hundred one".