11551240 has 32 divisors (see below), whose sum is σ = 27360000. Its totient is φ = 4377024.

The previous prime is 11551229. The next prime is 11551247. The reversal of 11551240 is 4215511.

It is a super-2 number, since 2×11551240² = 266862291075200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (11551247) 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, 6840 + ... + 8359.

It is an arithmetic number, because the mean of its divisors is an integer number (855000).

Almost surely, 2^11551240 is an apocalyptic number.

11551240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11551240 is an abundant number, since it is smaller than the sum of its proper divisors (15808760).

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

11551240 is a wasteful number, since it uses less digits than its factorization.

11551240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15229 (or 15225 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 11551240 is about 3398.7115205619. The cubic root of 11551240 is about 226.0526152068.

Subtracting from 11551240 its sum of digits (19), we obtain a triangular number (11551221 = T₄₈₀₆).

Adding to 11551240 its reverse (4215511), we get a palindrome (15766751).

The spelling of 11551240 in words is "eleven million, five hundred fifty-one thousand, two hundred forty".