1117542420 has 84 divisors (see below), whose sum is σ = 3518694900. Its totient is φ = 298007424.

The previous prime is 1117542403. The next prime is 1117542431. The reversal of 1117542420 is 242457111.

1117542420 is a `hidden beast` number, since 1 + 117 + 542 + 4 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 782432784 + 335109636 = 27972^2 + 18306^2 .

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 (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 23745 + ... + 52904.

It is an arithmetic number, because the mean of its divisors is an integer number (41889225).

Almost surely, 2^1117542420 is an apocalyptic number.

1117542420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1117542420 is an abundant number, since it is smaller than the sum of its proper divisors (2401152480).

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

1117542420 is an equidigital number, since it uses as much as digits as its factorization.

1117542420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76676 (or 76659 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 1117542420 is about 33429.6637733615. The cubic root of 1117542420 is about 1037.7386825898.

Adding to 1117542420 its reverse (242457111), we get a palindrome (1359999531).

The spelling of 1117542420 in words is "one billion, one hundred seventeen million, five hundred forty-two thousand, four hundred twenty".