42509712 has 40 divisors (see below), whose sum is σ = 125505856. Its totient is φ = 12145536.

The previous prime is 42509653. The next prime is 42509717. The reversal of 42509712 is 21790524.

It is a super-2 number, since 2×42509712² = 3614151228645888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42509712.

It is not an unprimeable number, because it can be changed into a prime (42509717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62923 + ... + 63594.

Almost surely, 2^42509712 is an apocalyptic number.

42509712 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

42509712 is an abundant number, since it is smaller than the sum of its proper divisors (82996144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42509712 is a wasteful number, since it uses less digits than its factorization.

42509712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126535 (or 126529 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 42509712 is about 6519.9472390503. The cubic root of 42509712 is about 349.0031827582.

The spelling of 42509712 in words is "forty-two million, five hundred nine thousand, seven hundred twelve".