42134251 has 2 divisors, whose sum is σ = 42134252. Its totient is φ = 42134250.

The previous prime is 42134243. The next prime is 42134269. The reversal of 42134251 is 15243124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42134251 - 2³ = 42134243 is a prime.

It is not a weakly prime, because it can be changed into another prime (42134051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21067125 + 21067126.

It is an arithmetic number, because the mean of its divisors is an integer number (21067126).

Almost surely, 2^42134251 is an apocalyptic number.

42134251 is a deficient number, since it is larger than the sum of its proper divisors (1).

42134251 is an equidigital number, since it uses as much as digits as its factorization.

42134251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 22.

The square root of 42134251 is about 6491.0901241625. The cubic root of 42134251 is about 347.9726356913.

Adding to 42134251 its reverse (15243124), we get a palindrome (57377375).

It can be divided in two parts, 4213 and 4251, that added together give a square (8464 = 92²).

The spelling of 42134251 in words is "forty-two million, one hundred thirty-four thousand, two hundred fifty-one".