42154687 has 2 divisors, whose sum is σ = 42154688. Its totient is φ = 42154686.

The previous prime is 42154681. The next prime is 42154709. The reversal of 42154687 is 78645124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42154687 - 2²³ = 33766079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42154681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21077343 + 21077344.

It is an arithmetic number, because the mean of its divisors is an integer number (21077344).

Almost surely, 2^42154687 is an apocalyptic number.

42154687 is a deficient number, since it is larger than the sum of its proper divisors (1).

42154687 is an equidigital number, since it uses as much as digits as its factorization.

42154687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 37.

The square root of 42154687 is about 6492.6640911108. The cubic root of 42154687 is about 348.0288846197.

The spelling of 42154687 in words is "forty-two million, one hundred fifty-four thousand, six hundred eighty-seven".