42280891 has 2 divisors, whose sum is σ = 42280892. Its totient is φ = 42280890.

The previous prime is 42280873. The next prime is 42280907. The reversal of 42280891 is 19808224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42280891 - 2¹¹ = 42278843 is a prime.

It is not a weakly prime, because it can be changed into another prime (42280291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21140445 + 21140446.

It is an arithmetic number, because the mean of its divisors is an integer number (21140446).

Almost surely, 2^42280891 is an apocalyptic number.

42280891 is a deficient number, since it is larger than the sum of its proper divisors (1).

42280891 is an equidigital number, since it uses as much as digits as its factorization.

42280891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 42280891 is about 6502.3757965839. The cubic root of 42280891 is about 348.3758517932.

The spelling of 42280891 in words is "forty-two million, two hundred eighty thousand, eight hundred ninety-one".