1122540 has 48 divisors (see below), whose sum is σ = 3211488. Its totient is φ = 292864.

The previous prime is 1122533. The next prime is 1122551. The reversal of 1122540 is 452211.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3004 + ... + 3356.

It is an arithmetic number, because the mean of its divisors is an integer number (66906).

2^1122540 is an apocalyptic number.

1122540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a pronic number, being equal to 1059×1060.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1122540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1605744).

1122540 is an abundant number, since it is smaller than the sum of its proper divisors (2088948).

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

1122540 is a wasteful number, since it uses less digits than its factorization.

1122540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418 (or 416 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1122540 is about 1059.4998820198. The cubic root of 1122540 is about 103.9283283308.

Adding to 1122540 its reverse (452211), we get a palindrome (1574751).

The spelling of 1122540 in words is "one million, one hundred twenty-two thousand, five hundred forty".