11901520 has 40 divisors (see below), whose sum is σ = 28569600. Its totient is φ = 4606080.

The previous prime is 11901509. The next prime is 11901529. The reversal of 11901520 is 2510911.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11901529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81 + ... + 4879.

It is an arithmetic number, because the mean of its divisors is an integer number (714240).

Almost surely, 2^11901520 is an apocalyptic number.

11901520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11901520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14284800).

11901520 is an abundant number, since it is smaller than the sum of its proper divisors (16668080).

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

11901520 is a wasteful number, since it uses less digits than its factorization.

11901520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4843 (or 4837 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 11901520 is about 3449.8579680909. The cubic root of 11901520 is about 228.3148415356.

It can be divided in two parts, 11901 and 520, that added together give a palindrome (12421).

The spelling of 11901520 in words is "eleven million, nine hundred one thousand, five hundred twenty".