42525729 has 12 divisors (see below), whose sum is σ = 63701456. Its totient is φ = 28350324.

The previous prime is 42525701. The next prime is 42525731. The reversal of 42525729 is 92752524.

It is a happy number.

It is not a de Polignac number, because 42525729 - 2¹³ = 42517537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42525693 and 42525702.

It is not an unprimeable number, because it can be changed into a prime (42525739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87259 + ... + 87744.

Almost surely, 2^42525729 is an apocalyptic number.

It is an amenable number.

42525729 is a deficient number, since it is larger than the sum of its proper divisors (21175727).

42525729 is an equidigital number, since it uses as much as digits as its factorization.

42525729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175018 (or 175006 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 42525729 is about 6521.1754308560. The cubic root of 42525729 is about 349.0470102491.

The spelling of 42525729 in words is "forty-two million, five hundred twenty-five thousand, seven hundred twenty-nine".