11142550 has 48 divisors (see below), whose sum is σ = 22476240. Its totient is φ = 4095360.

The previous prime is 11142539. The next prime is 11142553. The reversal of 11142550 is 5524111.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11142553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34992 + ... + 35308.

It is an arithmetic number, because the mean of its divisors is an integer number (468255).

Almost surely, 2^11142550 is an apocalyptic number.

11142550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11142550 is an abundant number, since it is smaller than the sum of its proper divisors (11333690).

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

11142550 is a wasteful number, since it uses less digits than its factorization.

11142550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 380 counting only the distinct ones).

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

The square root of 11142550 is about 3338.0458355151. The cubic root of 11142550 is about 223.3545807859.

Adding to 11142550 its reverse (5524111), we get a palindrome (16666661).

The spelling of 11142550 in words is "eleven million, one hundred forty-two thousand, five hundred fifty".