42129259 has 2 divisors, whose sum is σ = 42129260. Its totient is φ = 42129258.

The previous prime is 42129253. The next prime is 42129287. The reversal of 42129259 is 95292124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42129259 - 2¹³ = 42121067 is a prime.

It is equal to p_2554954 and since 42129259 and 2554954 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (42129253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21064629 + 21064630.

It is an arithmetic number, because the mean of its divisors is an integer number (21064630).

Almost surely, 2^42129259 is an apocalyptic number.

42129259 is a deficient number, since it is larger than the sum of its proper divisors (1).

42129259 is an equidigital number, since it uses as much as digits as its factorization.

42129259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 34.

The square root of 42129259 is about 6490.7055856817. The cubic root of 42129259 is about 347.9588927311.

The spelling of 42129259 in words is "forty-two million, one hundred twenty-nine thousand, two hundred fifty-nine".