1122542100 has 54 divisors (see below), whose sum is σ = 3518548670. Its totient is φ = 299344320.

The previous prime is 1122542093. The next prime is 1122542107. The reversal of 1122542100 is 12452211.

1122542100 is a `hidden beast` number, since 1 + 1 + 22 + 542 + 100 = 666.

It is an interprime number because it is at equal distance from previous prime (1122542093) and next prime (1122542107).

It can be written as a sum of positive squares in 3 ways, for example, as 256064004 + 866478096 = 16002^2 + 29436^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122542107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 622735 + ... + 624534.

Almost surely, 2^1122542100 is an apocalyptic number.

1122542100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122542100 is an abundant number, since it is smaller than the sum of its proper divisors (2396006570).

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

1122542100 is a wasteful number, since it uses less digits than its factorization.

1122542100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247289 (or 1247279 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1122542100 is about 33504.3594178429. The cubic root of 1122542100 is about 1039.2839313899.

Adding to 1122542100 its reverse (12452211), we get a palindrome (1134994311).

The spelling of 1122542100 in words is "one billion, one hundred twenty-two million, five hundred forty-two thousand, one hundred".