1121550 has 24 divisors (see below), whose sum is σ = 2781816. Its totient is φ = 299040.

The previous prime is 1121543. The next prime is 1121557. The reversal of 1121550 is 551211.

It is an interprime number because it is at equal distance from previous prime (1121543) and next prime (1121557).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3589 + ... + 3888.

It is an arithmetic number, because the mean of its divisors is an integer number (115909).

2^1121550 is an apocalyptic number.

1121550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1121550 is an abundant number, since it is smaller than the sum of its proper divisors (1660266).

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

1121550 is a wasteful number, since it uses less digits than its factorization.

1121550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7492 (or 7487 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 1121550 is about 1059.0325774026. The cubic root of 1121550 is about 103.8977668937.

Adding to 1121550 its reverse (551211), we get a palindrome (1672761).

The spelling of 1121550 in words is "one million, one hundred twenty-one thousand, five hundred fifty".