42131347 has 2 divisors, whose sum is σ = 42131348. Its totient is φ = 42131346.

The previous prime is 42131281. The next prime is 42131363. The reversal of 42131347 is 74313124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42131347 is a prime.

It is not a weakly prime, because it can be changed into another prime (42138347) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21065673 + 21065674.

It is an arithmetic number, because the mean of its divisors is an integer number (21065674).

Almost surely, 2^42131347 is an apocalyptic number.

42131347 is a deficient number, since it is larger than the sum of its proper divisors (1).

42131347 is an equidigital number, since it uses as much as digits as its factorization.

42131347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 25.

The square root of 42131347 is about 6490.8664290678. The cubic root of 42131347 is about 347.9646411205.

The spelling of 42131347 in words is "forty-two million, one hundred thirty-one thousand, three hundred forty-seven".