11251220 has 24 divisors (see below), whose sum is σ = 24205608. Its totient is φ = 4390400.

The previous prime is 11251213. The next prime is 11251277. The reversal of 11251220 is 2215211.

11251220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 148996 + 11102224 = 386^2 + 3332^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11251195 and 11251204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6041 + ... + 7680.

It is an arithmetic number, because the mean of its divisors is an integer number (1008567).

Almost surely, 2^11251220 is an apocalyptic number.

11251220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11251220 is an abundant number, since it is smaller than the sum of its proper divisors (12954388).

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

11251220 is a wasteful number, since it uses less digits than its factorization.

11251220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13771 (or 13769 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 11251220 is about 3354.2838281815. The cubic root of 11251220 is about 224.0783367592.

Adding to 11251220 its reverse (2215211), we get a palindrome (13466431).

The spelling of 11251220 in words is "eleven million, two hundred fifty-one thousand, two hundred twenty".