11425509 has 16 divisors (see below), whose sum is σ = 17001600. Its totient is φ = 7583328.

The previous prime is 11425501. The next prime is 11425537. The reversal of 11425509 is 90552411.

It is not a de Polignac number, because 11425509 - 2³ = 11425501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11425501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6297 + ... + 7905.

It is an arithmetic number, because the mean of its divisors is an integer number (1062600).

Almost surely, 2^11425509 is an apocalyptic number.

It is an amenable number.

11425509 is a deficient number, since it is larger than the sum of its proper divisors (5576091).

11425509 is a wasteful number, since it uses less digits than its factorization.

11425509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881 (or 1875 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 11425509 is about 3380.1640492733. The cubic root of 11425509 is about 225.2294548115.

The spelling of 11425509 in words is "eleven million, four hundred twenty-five thousand, five hundred nine".