1115402100 has 72 divisors (see below), whose sum is σ = 3233855520. Its totient is φ = 296830080.

The previous prime is 1115402081. The next prime is 1115402107. The reversal of 1115402100 is 12045111.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1115402100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115402107) 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, 153346 + ... + 160454.

It is an arithmetic number, because the mean of its divisors is an integer number (44914660).

Almost surely, 2^1115402100 is an apocalyptic number.

1115402100 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 1115402100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1616927760).

1115402100 is an abundant number, since it is smaller than the sum of its proper divisors (2118453420).

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

1115402100 is a wasteful number, since it uses less digits than its factorization.

1115402100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7649 (or 7642 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 1115402100 is about 33397.6361438950. The cubic root of 1115402100 is about 1037.0757659746.

Adding to 1115402100 its reverse (12045111), we get a palindrome (1127447211).

The spelling of 1115402100 in words is "one billion, one hundred fifteen million, four hundred two thousand, one hundred".