1115821534 has 8 divisors (see below), whose sum is σ = 1712656440. Its totient is φ = 544936056.

The previous prime is 1115821513. The next prime is 1115821589. The reversal of 1115821534 is 4351285111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1115821534² = 2490115391476226312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1115821496 and 1115821505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6487249 + ... + 6487420.

It is an arithmetic number, because the mean of its divisors is an integer number (214082055).

Almost surely, 2^1115821534 is an apocalyptic number.

1115821534 is a deficient number, since it is larger than the sum of its proper divisors (596834906).

1115821534 is a wasteful number, since it uses less digits than its factorization.

1115821534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12974714.

The product of its digits is 4800, while the sum is 31.

The square root of 1115821534 is about 33403.9149501971. The cubic root of 1115821534 is about 1037.2057431145.

It can be divided in two parts, 1115 and 821534, that added together give a square (822649 = 907²).

The spelling of 1115821534 in words is "one billion, one hundred fifteen million, eight hundred twenty-one thousand, five hundred thirty-four".