42387211 has 2 divisors, whose sum is σ = 42387212. Its totient is φ = 42387210.

The previous prime is 42387197. The next prime is 42387217. The reversal of 42387211 is 11278324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42387211 - 2⁵ = 42387179 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42387211.

It is not a weakly prime, because it can be changed into another prime (42387217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21193605 + 21193606.

It is an arithmetic number, because the mean of its divisors is an integer number (21193606).

Almost surely, 2^42387211 is an apocalyptic number.

42387211 is a deficient number, since it is larger than the sum of its proper divisors (1).

42387211 is an equidigital number, since it uses as much as digits as its factorization.

42387211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 28.

The square root of 42387211 is about 6510.5461368460. The cubic root of 42387211 is about 348.6676173047.

It can be divided in two parts, 4238 and 7211, that added together give a square (11449 = 107²).

The spelling of 42387211 in words is "forty-two million, three hundred eighty-seven thousand, two hundred eleven".