42423149 has 2 divisors, whose sum is σ = 42423150. Its totient is φ = 42423148.

The previous prime is 42423133. The next prime is 42423163. The reversal of 42423149 is 94132424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40513225 + 1909924 = 6365^2 + 1382^2 .

It is a cyclic number.

It is not a de Polignac number, because 42423149 - 2⁴ = 42423133 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42423119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21211574 + 21211575.

It is an arithmetic number, because the mean of its divisors is an integer number (21211575).

Almost surely, 2^42423149 is an apocalyptic number.

It is an amenable number.

42423149 is a deficient number, since it is larger than the sum of its proper divisors (1).

42423149 is an equidigital number, since it uses as much as digits as its factorization.

42423149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The square root of 42423149 is about 6513.3055355940. The cubic root of 42423149 is about 348.7661287574.

The spelling of 42423149 in words is "forty-two million, four hundred twenty-three thousand, one hundred forty-nine".