2125509 has 8 divisors (see below), whose sum is σ = 2849472. Its totient is φ = 1409280.

The previous prime is 2125477. The next prime is 2125517. The reversal of 2125509 is 9055212.

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

It is not a de Polignac number, because 2125509 - 2⁵ = 2125477 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125559) 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, 1257 + ... + 2414.

It is an arithmetic number, because the mean of its divisors is an integer number (356184).

2^2125509 is an apocalyptic number.

It is an amenable number.

2125509 is a deficient number, since it is larger than the sum of its proper divisors (723963).

2125509 is a wasteful number, since it uses less digits than its factorization.

2125509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3867.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 2125509 is about 1457.9125488177. The cubic root of 2125509 is about 128.5743436729.

The spelling of 2125509 in words is "two million, one hundred twenty-five thousand, five hundred nine".