42970509 has 24 divisors (see below), whose sum is σ = 68582592. Its totient is φ = 25787520.

The previous prime is 42970507. The next prime is 42970519. The reversal of 42970509 is 90507924.

It is not a de Polignac number, because 42970509 - 2¹ = 42970507 is a prime.

It is a super-3 number, since 3×42970509³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42970507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2587 + ... + 9624.

It is an arithmetic number, because the mean of its divisors is an integer number (2857608).

Almost surely, 2^42970509 is an apocalyptic number.

It is an amenable number.

42970509 is a deficient number, since it is larger than the sum of its proper divisors (25612083).

42970509 is a wasteful number, since it uses less digits than its factorization.

42970509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12257 (or 12254 counting only the distinct ones).

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

The square root of 42970509 is about 6555.1894709459. The cubic root of 42970509 is about 350.2596956967.

The spelling of 42970509 in words is "forty-two million, nine hundred seventy thousand, five hundred nine".