42508651 has 2 divisors, whose sum is σ = 42508652. Its totient is φ = 42508650.

The previous prime is 42508649. The next prime is 42508663. The reversal of 42508651 is 15680524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42508651 - 2¹ = 42508649 is a prime.

Together with 42508649, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42508621) 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, 21254325 + 21254326.

It is an arithmetic number, because the mean of its divisors is an integer number (21254326).

Almost surely, 2^42508651 is an apocalyptic number.

42508651 is a deficient number, since it is larger than the sum of its proper divisors (1).

42508651 is an equidigital number, since it uses as much as digits as its factorization.

42508651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 42508651 is about 6519.8658728535. The cubic root of 42508651 is about 349.0002791436. Note that the first 3 decimals are identical.

The spelling of 42508651 in words is "forty-two million, five hundred eight thousand, six hundred fifty-one".