42115427 has 2 divisors, whose sum is σ = 42115428. Its totient is φ = 42115426.

The previous prime is 42115421. The next prime is 42115429. The reversal of 42115427 is 72451124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42115427 is a prime.

Together with 42115429, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42115396 and 42115405.

It is not a weakly prime, because it can be changed into another prime (42115421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21057713 + 21057714.

It is an arithmetic number, because the mean of its divisors is an integer number (21057714).

Almost surely, 2^42115427 is an apocalyptic number.

42115427 is a deficient number, since it is larger than the sum of its proper divisors (1).

42115427 is an equidigital number, since it uses as much as digits as its factorization.

42115427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240, while the sum is 26.

The square root of 42115427 is about 6489.6399746057. The cubic root of 42115427 is about 347.9208076065.

The spelling of 42115427 in words is "forty-two million, one hundred fifteen thousand, four hundred twenty-seven".