42130849 has 2 divisors, whose sum is σ = 42130850. Its totient is φ = 42130848.

The previous prime is 42130817. The next prime is 42130867. The reversal of 42130849 is 94803124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37149025 + 4981824 = 6095^2 + 2232^2 .

It is a cyclic number.

It is not a de Polignac number, because 42130849 - 2⁵ = 42130817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42130849.

It is not a weakly prime, because it can be changed into another prime (42130889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21065424 + 21065425.

It is an arithmetic number, because the mean of its divisors is an integer number (21065425).

Almost surely, 2^42130849 is an apocalyptic number.

It is an amenable number.

42130849 is a deficient number, since it is larger than the sum of its proper divisors (1).

42130849 is an equidigital number, since it uses as much as digits as its factorization.

42130849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 42130849 is about 6490.8280673578. The cubic root of 42130849 is about 347.9632701139.

The spelling of 42130849 in words is "forty-two million, one hundred thirty thousand, eight hundred forty-nine".