42504071 has 2 divisors, whose sum is σ = 42504072. Its totient is φ = 42504070.

The previous prime is 42504067. The next prime is 42504073. The reversal of 42504071 is 17040524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42504071 - 2² = 42504067 is a prime.

Together with 42504073, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42504073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21252035 + 21252036.

It is an arithmetic number, because the mean of its divisors is an integer number (21252036).

Almost surely, 2^42504071 is an apocalyptic number.

42504071 is a deficient number, since it is larger than the sum of its proper divisors (1).

42504071 is an equidigital number, since it uses as much as digits as its factorization.

42504071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 42504071 is about 6519.5146291729. The cubic root of 42504071 is about 348.9877446073.

Adding to 42504071 its reverse (17040524), we get a palindrome (59544595).

The spelling of 42504071 in words is "forty-two million, five hundred four thousand, seventy-one".