11420556 has 48 divisors (see below), whose sum is σ = 30858240. Its totient is φ = 3219840.

The previous prime is 11420543. The next prime is 11420567. The reversal of 11420556 is 65502411.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5776 + ... + 7496.

It is an arithmetic number, because the mean of its divisors is an integer number (642880).

Almost surely, 2^11420556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11420556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15429120).

11420556 is an abundant number, since it is smaller than the sum of its proper divisors (19437684).

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

11420556 is a wasteful number, since it uses less digits than its factorization.

11420556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1814 (or 1812 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 11420556 is about 3379.4313131058. The cubic root of 11420556 is about 225.1969041763.

Adding to 11420556 its reverse (65502411), we get a palindrome (76922967).

The spelling of 11420556 in words is "eleven million, four hundred twenty thousand, five hundred fifty-six".