11471520 has 48 divisors (see below), whose sum is σ = 36136800. Its totient is φ = 3058944.

The previous prime is 11471491. The next prime is 11471527. The reversal of 11471520 is 2517411.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×11471520² = 263191542220800, which contains 22 as substring.

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (11471527) 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, 11470 + ... + 12429.

It is an arithmetic number, because the mean of its divisors is an integer number (752850).

Almost surely, 2^11471520 is an apocalyptic number.

11471520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11471520 is an abundant number, since it is smaller than the sum of its proper divisors (24665280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11471520 is a wasteful number, since it uses less digits than its factorization.

11471520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23917 (or 23909 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 11471520 is about 3386.9632416074. The cubic root of 11471520 is about 225.5313860047.

Adding to 11471520 its reverse (2517411), we get a palindrome (13988931).

The spelling of 11471520 in words is "eleven million, four hundred seventy-one thousand, five hundred twenty".