42011287 has 2 divisors, whose sum is σ = 42011288. Its totient is φ = 42011286.

The previous prime is 42011251. The next prime is 42011297. The reversal of 42011287 is 78211024.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42011287 - 2²³ = 33622679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42011297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21005643 + 21005644.

It is an arithmetic number, because the mean of its divisors is an integer number (21005644).

Almost surely, 2^42011287 is an apocalyptic number.

42011287 is a deficient number, since it is larger than the sum of its proper divisors (1).

42011287 is an equidigital number, since it uses as much as digits as its factorization.

42011287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 42011287 is about 6481.6114508662. The cubic root of 42011287 is about 347.6337997257.

The spelling of 42011287 in words is "forty-two million, eleven thousand, two hundred eighty-seven".