42145727 has 6 divisors (see below), whose sum is σ = 45637272. Its totient is φ = 38903592.

The previous prime is 42145717. The next prime is 42145751. The reversal of 42145727 is 72754124.

It is not a de Polignac number, because 42145727 - 2⁴ = 42145711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42145693 and 42145702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42145717) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124523 + ... + 124860.

It is an arithmetic number, because the mean of its divisors is an integer number (7606212).

Almost surely, 2^42145727 is an apocalyptic number.

42145727 is a deficient number, since it is larger than the sum of its proper divisors (3491545).

42145727 is a wasteful number, since it uses less digits than its factorization.

42145727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249409 (or 249396 counting only the distinct ones).

The product of its digits is 15680, while the sum is 32.

The square root of 42145727 is about 6491.9740449266. The cubic root of 42145727 is about 348.0042249674.

The spelling of 42145727 in words is "forty-two million, one hundred forty-five thousand, seven hundred twenty-seven".