42407191 has 2 divisors, whose sum is σ = 42407192. Its totient is φ = 42407190.

The previous prime is 42407171. The next prime is 42407201. The reversal of 42407191 is 19170424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42407191 - 2⁷ = 42407063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42407111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21203595 + 21203596.

It is an arithmetic number, because the mean of its divisors is an integer number (21203596).

Almost surely, 2^42407191 is an apocalyptic number.

42407191 is a deficient number, since it is larger than the sum of its proper divisors (1).

42407191 is an equidigital number, since it uses as much as digits as its factorization.

42407191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 42407191 is about 6512.0803895529. The cubic root of 42407191 is about 348.7223923539.

The spelling of 42407191 in words is "forty-two million, four hundred seven thousand, one hundred ninety-one".