11521719 has 12 divisors (see below), whose sum is σ = 18155592. Its totient is φ = 6982800.

The previous prime is 11521717. The next prime is 11521747. The reversal of 11521719 is 91712511.

It is not a de Polignac number, because 11521719 - 2¹ = 11521717 is a prime.

It is a super-2 number, since 2×11521719² = 265500017429922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11521692 and 11521701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11521711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58092 + ... + 58289.

It is an arithmetic number, because the mean of its divisors is an integer number (1512966).

Almost surely, 2^11521719 is an apocalyptic number.

11521719 is a deficient number, since it is larger than the sum of its proper divisors (6633873).

11521719 is a wasteful number, since it uses less digits than its factorization.

11521719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116398 (or 116395 counting only the distinct ones).

The product of its digits is 630, while the sum is 27.

The square root of 11521719 is about 3394.3657728654. The cubic root of 11521719 is about 225.8598799903.

The spelling of 11521719 in words is "eleven million, five hundred twenty-one thousand, seven hundred nineteen".