42448591 has 2 divisors, whose sum is σ = 42448592. Its totient is φ = 42448590.

The previous prime is 42448559. The next prime is 42448621. The reversal of 42448591 is 19584424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42448591 - 2⁵ = 42448559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42448591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42448531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21224295 + 21224296.

It is an arithmetic number, because the mean of its divisors is an integer number (21224296).

Almost surely, 2^42448591 is an apocalyptic number.

42448591 is a deficient number, since it is larger than the sum of its proper divisors (1).

42448591 is an equidigital number, since it uses as much as digits as its factorization.

42448591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 37.

The square root of 42448591 is about 6515.2583218166. The cubic root of 42448591 is about 348.8358354687.

The spelling of 42448591 in words is "forty-two million, four hundred forty-eight thousand, five hundred ninety-one".