42975009 has 48 divisors (see below), whose sum is σ = 80821440. Its totient is φ = 22317120.

The previous prime is 42975001. The next prime is 42975029. The reversal of 42975009 is 90057924.

It is not a de Polignac number, because 42975009 - 2³ = 42975001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42975001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13077 + ... + 16029.

It is an arithmetic number, because the mean of its divisors is an integer number (1683780).

Almost surely, 2^42975009 is an apocalyptic number.

42975009 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

42975009 is a deficient number, since it is larger than the sum of its proper divisors (37846431).

42975009 is a wasteful number, since it uses less digits than its factorization.

42975009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2987 (or 2974 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 42975009 is about 6555.5327014668. The cubic root of 42975009 is about 350.2719220170.

The spelling of 42975009 in words is "forty-two million, nine hundred seventy-five thousand, nine".