1201000009 has 8 divisors (see below), whose sum is σ = 1320184800. Its totient is φ = 1083482400.

The previous prime is 1201000007. The next prime is 1201000027. The reversal of 1201000009 is 9000001021.

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

It is not a de Polignac number, because 1201000009 - 2¹ = 1201000007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201000007) 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, 415284 + ... + 418165.

It is an arithmetic number, because the mean of its divisors is an integer number (165023100).

Almost surely, 2^1201000009 is an apocalyptic number.

It is an amenable number.

1201000009 is a deficient number, since it is larger than the sum of its proper divisors (119184791).

1201000009 is a wasteful number, since it uses less digits than its factorization.

1201000009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833591.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1201000009 is about 34655.4470321766. The cubic root of 1201000009 is about 1062.9536728163.

The spelling of 1201000009 in words is "one billion, two hundred one million, nine", and thus it is an aban number.