40125009 has 8 divisors (see below), whose sum is σ = 55344960. Its totient is φ = 25827536.

The previous prime is 40124963. The next prime is 40125023. The reversal of 40125009 is 90052104.

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 40125009 - 2¹⁶ = 40059473 is a prime.

It is a super-2 number, since 2×40125009² = 3220032694500162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40125209) 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, 230517 + ... + 230690.

It is an arithmetic number, because the mean of its divisors is an integer number (6918120).

Almost surely, 2^40125009 is an apocalyptic number.

It is an amenable number.

40125009 is a deficient number, since it is larger than the sum of its proper divisors (15219951).

40125009 is a wasteful number, since it uses less digits than its factorization.

40125009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461239.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 40125009 is about 6334.4304400633. The cubic root of 40125009 is about 342.3510894750.

The spelling of 40125009 in words is "forty million, one hundred twenty-five thousand, nine".