42508451 has 2 divisors, whose sum is σ = 42508452. Its totient is φ = 42508450.

The previous prime is 42508441. The next prime is 42508457. The reversal of 42508451 is 15480524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42508451 - 2¹⁴ = 42492067 is a prime.

It is not a weakly prime, because it can be changed into another prime (42508457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21254225 + 21254226.

It is an arithmetic number, because the mean of its divisors is an integer number (21254226).

Almost surely, 2^42508451 is an apocalyptic number.

42508451 is a deficient number, since it is larger than the sum of its proper divisors (1).

42508451 is an equidigital number, since it uses as much as digits as its factorization.

42508451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 42508451 is about 6519.8505350966. The cubic root of 42508451 is about 348.9997318028. Note that the first 3 decimals are identical.

Adding to 42508451 its reverse (15480524), we get a palindrome (57988975).

The spelling of 42508451 in words is "forty-two million, five hundred eight thousand, four hundred fifty-one".