42356641 has 2 divisors, whose sum is σ = 42356642. Its totient is φ = 42356640.

The previous prime is 42356609. The next prime is 42356647. The reversal of 42356641 is 14665324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42315025 + 41616 = 6505^2 + 204^2 .

It is a cyclic number.

It is not a de Polignac number, because 42356641 - 2⁵ = 42356609 is a prime.

It is not a weakly prime, because it can be changed into another prime (42356647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21178320 + 21178321.

It is an arithmetic number, because the mean of its divisors is an integer number (21178321).

Almost surely, 2^42356641 is an apocalyptic number.

It is an amenable number.

42356641 is a deficient number, since it is larger than the sum of its proper divisors (1).

42356641 is an equidigital number, since it uses as much as digits as its factorization.

42356641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 31.

The square root of 42356641 is about 6508.1979840813. The cubic root of 42356641 is about 348.5837765091.

The spelling of 42356641 in words is "forty-two million, three hundred fifty-six thousand, six hundred forty-one".