2501009 has 12 divisors (see below), whose sum is σ = 2979504. Its totient is φ = 2092104.

The previous prime is 2501003. The next prime is 2501071. The reversal of 2501009 is 9001052.

It is not a de Polignac number, because 2501009 - 2⁸ = 2500753 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2501003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1514 + ... + 2700.

It is an arithmetic number, because the mean of its divisors is an integer number (248292).

2^2501009 is an apocalyptic number.

It is an amenable number.

2501009 is a deficient number, since it is larger than the sum of its proper divisors (478495).

2501009 is a wasteful number, since it uses less digits than its factorization.

2501009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244 (or 1237 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 2501009 is about 1581.4578717120. The cubic root of 2501009 is about 135.7391373564.

The spelling of 2501009 in words is "two million, five hundred one thousand, nine".