2521009 has 8 divisors (see below), whose sum is σ = 2585088. Its totient is φ = 2457840.

The previous prime is 2521003. The next prime is 2521019. The reversal of 2521009 is 9001252.

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 2521009 - 2¹¹ = 2518961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2521003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12699 + ... + 12895.

It is an arithmetic number, because the mean of its divisors is an integer number (323136).

2^2521009 is an apocalyptic number.

It is an amenable number.

2521009 is a deficient number, since it is larger than the sum of its proper divisors (64079).

2521009 is a wasteful number, since it uses less digits than its factorization.

2521009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 2521009 is about 1587.7685599608. The cubic root of 2521009 is about 136.1000021415.

The spelling of 2521009 in words is "two million, five hundred twenty-one thousand, nine".