42512447 has 2 divisors, whose sum is σ = 42512448. Its totient is φ = 42512446.

The previous prime is 42512419. The next prime is 42512467. The reversal of 42512447 is 74421524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42512447 - 2⁶ = 42512383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42512417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21256223 + 21256224.

It is an arithmetic number, because the mean of its divisors is an integer number (21256224).

Almost surely, 2^42512447 is an apocalyptic number.

42512447 is a deficient number, since it is larger than the sum of its proper divisors (1).

42512447 is an equidigital number, since it uses as much as digits as its factorization.

42512447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 29.

The square root of 42512447 is about 6520.1569766379. The cubic root of 42512447 is about 349.0106673477.

The spelling of 42512447 in words is "forty-two million, five hundred twelve thousand, four hundred forty-seven".