1122081400 has 144 divisors (see below), whose sum is σ = 2894346000. Its totient is φ = 404236800.

The previous prime is 1122081313. The next prime is 1122081407. The reversal of 1122081400 is 41802211.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122081407) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4815684 + ... + 4815916.

It is an arithmetic number, because the mean of its divisors is an integer number (20099625).

Almost surely, 2^1122081400 is an apocalyptic number.

1122081400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1122081400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1447173000).

1122081400 is an abundant number, since it is smaller than the sum of its proper divisors (1772264600).

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

1122081400 is a wasteful number, since it uses less digits than its factorization.

1122081400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 1122081400 is about 33497.4834875696. The cubic root of 1122081400 is about 1039.1417352017.

Adding to 1122081400 its reverse (41802211), we get a palindrome (1163883611).

The spelling of 1122081400 in words is "one billion, one hundred twenty-two million, eighty-one thousand, four hundred".