42154547 has 2 divisors, whose sum is σ = 42154548. Its totient is φ = 42154546.

The previous prime is 42154531. The next prime is 42154573. The reversal of 42154547 is 74545124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42154547 - 2⁴ = 42154531 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42154517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21077273 + 21077274.

It is an arithmetic number, because the mean of its divisors is an integer number (21077274).

Almost surely, 2^42154547 is an apocalyptic number.

42154547 is a deficient number, since it is larger than the sum of its proper divisors (1).

42154547 is an equidigital number, since it uses as much as digits as its factorization.

42154547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22400, while the sum is 32.

The square root of 42154547 is about 6492.6533097032. The cubic root of 42154547 is about 348.0284993395.

The spelling of 42154547 in words is "forty-two million, one hundred fifty-four thousand, five hundred forty-seven".