11261540 has 12 divisors (see below), whose sum is σ = 23649276. Its totient is φ = 4504608.

The previous prime is 11261539. The next prime is 11261543. The reversal of 11261540 is 4516211.

It can be written as a sum of positive squares in 2 ways, for example, as 7963684 + 3297856 = 2822^2 + 1816^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 563077 = 11261540 / (1 + 1 + 2 + 6 + 1 + 5 + 4 + 0).

It is not an unprimeable number, because it can be changed into a prime (11261543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281519 + ... + 281558.

It is an arithmetic number, because the mean of its divisors is an integer number (1970773).

Almost surely, 2^11261540 is an apocalyptic number.

11261540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11261540 is an abundant number, since it is smaller than the sum of its proper divisors (12387736).

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

11261540 is a wasteful number, since it uses less digits than its factorization.

11261540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563086 (or 563084 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 11261540 is about 3355.8218069498. The cubic root of 11261540 is about 224.1468265693.

Adding to 11261540 its reverse (4516211), we get a palindrome (15777751).

The spelling of 11261540 in words is "eleven million, two hundred sixty-one thousand, five hundred forty".