11521775 has 6 divisors (see below), whose sum is σ = 14287032. Its totient is φ = 9217400.

The previous prime is 11521751. The next prime is 11521793. The reversal of 11521775 is 57712511.

It is not a de Polignac number, because 11521775 - 2⁶ = 11521711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 230411 + ... + 230460.

It is an arithmetic number, because the mean of its divisors is an integer number (2381172).

Almost surely, 2^11521775 is an apocalyptic number.

11521775 is a deficient number, since it is larger than the sum of its proper divisors (2765257).

11521775 is an equidigital number, since it uses as much as digits as its factorization.

11521775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460881 (or 460876 counting only the distinct ones).

The product of its digits is 2450, while the sum is 29.

The square root of 11521775 is about 3394.3740218190. The cubic root of 11521775 is about 225.8602459118.

The spelling of 11521775 in words is "eleven million, five hundred twenty-one thousand, seven hundred seventy-five".