42510001 has 2 divisors, whose sum is σ = 42510002. Its totient is φ = 42510000.

The previous prime is 42509981. The next prime is 42510007. The reversal of 42510001 is 10001524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30813601 + 11696400 = 5551^2 + 3420^2 .

It is a cyclic number.

It is not a de Polignac number, because 42510001 - 2¹¹ = 42507953 is a prime.

It is not a weakly prime, because it can be changed into another prime (42510007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21255000 + 21255001.

It is an arithmetic number, because the mean of its divisors is an integer number (21255001).

Almost surely, 2^42510001 is an apocalyptic number.

It is an amenable number.

42510001 is a deficient number, since it is larger than the sum of its proper divisors (1).

42510001 is an equidigital number, since it uses as much as digits as its factorization.

42510001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 42510001 is about 6519.9694017687. The cubic root of 42510001 is about 349.0039736496.

Adding to 42510001 its reverse (10001524), we get a palindrome (52511525).

The spelling of 42510001 in words is "forty-two million, five hundred ten thousand, one".