42959209 has 8 divisors (see below), whose sum is σ = 45397440. Its totient is φ = 40538736.

The previous prime is 42959197. The next prime is 42959243. The reversal of 42959209 is 90295924.

42959209 = T₄₃₅ + T₄₃₆ + ... + T₆₉₇.

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 42959209 - 2⁵ = 42959177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42959249) 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, 699 + ... + 9295.

It is an arithmetic number, because the mean of its divisors is an integer number (5674680).

Almost surely, 2^42959209 is an apocalyptic number.

It is an amenable number.

42959209 is a deficient number, since it is larger than the sum of its proper divisors (2438231).

42959209 is a wasteful number, since it uses less digits than its factorization.

42959209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8879.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 42959209 is about 6554.3275017350. The cubic root of 42959209 is about 350.2289902847.

The spelling of 42959209 in words is "forty-two million, nine hundred fifty-nine thousand, two hundred nine".