1115421624 has 128 divisors (see below), whose sum is σ = 3161088000. Its totient is φ = 364372992.

The previous prime is 1115421613. The next prime is 1115421641. The reversal of 1115421624 is 4261245111.

1115421624 is a `hidden beast` number, since 1 + 1 + 15 + 4 + 21 + 624 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2912137 + ... + 2912519.

It is an arithmetic number, because the mean of its divisors is an integer number (24696000).

Almost surely, 2^1115421624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1115421624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1580544000).

1115421624 is an abundant number, since it is smaller than the sum of its proper divisors (2045666376).

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

1115421624 is a wasteful number, since it uses less digits than its factorization.

1115421624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634 (or 624 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1115421624 is about 33397.9284387520. The cubic root of 1115421624 is about 1037.0818169312.

Adding to 1115421624 its reverse (4261245111), we get a palindrome (5376666735).

The spelling of 1115421624 in words is "one billion, one hundred fifteen million, four hundred twenty-one thousand, six hundred twenty-four".