42281791 has 2 divisors, whose sum is σ = 42281792. Its totient is φ = 42281790.

The previous prime is 42281761. The next prime is 42281803. The reversal of 42281791 is 19718224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42281791 - 2¹³ = 42273599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42281741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21140895 + 21140896.

It is an arithmetic number, because the mean of its divisors is an integer number (21140896).

Almost surely, 2^42281791 is an apocalyptic number.

42281791 is a deficient number, since it is larger than the sum of its proper divisors (1).

42281791 is an equidigital number, since it uses as much as digits as its factorization.

42281791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 34.

The square root of 42281791 is about 6502.4450016897. The cubic root of 42281791 is about 348.3783236431.

The spelling of 42281791 in words is "forty-two million, two hundred eighty-one thousand, seven hundred ninety-one".