42355961 has 2 divisors, whose sum is σ = 42355962. Its totient is φ = 42355960.

The previous prime is 42355939. The next prime is 42355967. The reversal of 42355961 is 16955324.

42355961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41925625 + 430336 = 6475^2 + 656^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42355961 is a prime.

It is not a weakly prime, because it can be changed into another prime (42355967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21177980 + 21177981.

It is an arithmetic number, because the mean of its divisors is an integer number (21177981).

Almost surely, 2^42355961 is an apocalyptic number.

It is an amenable number.

42355961 is a deficient number, since it is larger than the sum of its proper divisors (1).

42355961 is an equidigital number, since it uses as much as digits as its factorization.

42355961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 35.

The square root of 42355961 is about 6508.1457420682. The cubic root of 42355961 is about 348.5819110933.

The spelling of 42355961 in words is "forty-two million, three hundred fifty-five thousand, nine hundred sixty-one".