42912709 has 8 divisors (see below), whose sum is σ = 51928128. Its totient is φ = 34618560.

The previous prime is 42912679. The next prime is 42912719. The reversal of 42912709 is 90721924.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42912709 - 2⁵ = 42912677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42912719) 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, 180187 + ... + 180424.

It is an arithmetic number, because the mean of its divisors is an integer number (6491016).

Almost surely, 2^42912709 is an apocalyptic number.

It is an amenable number.

42912709 is a deficient number, since it is larger than the sum of its proper divisors (9015419).

42912709 is a wasteful number, since it uses less digits than its factorization.

42912709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360635.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 42912709 is about 6550.7792666216. The cubic root of 42912709 is about 350.1025794565.

The spelling of 42912709 in words is "forty-two million, nine hundred twelve thousand, seven hundred nine".