1121478539 has 4 divisors (see below), whose sum is σ = 1122255024. Its totient is φ = 1120702056.

The previous prime is 1121478511. The next prime is 1121478563. The reversal of 1121478539 is 9358741211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9358741211 = 1619 ⋅5780569.

It is a cyclic number.

It is not a de Polignac number, because 1121478539 - 2⁸ = 1121478283 is a prime.

It is a super-2 number, since 2×1121478539² = 2515428226875149042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121478496 and 1121478505.

It is not an unprimeable number, because it can be changed into a prime (1121478739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386072 + ... + 388965.

It is an arithmetic number, because the mean of its divisors is an integer number (280563756).

Almost surely, 2^1121478539 is an apocalyptic number.

1121478539 is a deficient number, since it is larger than the sum of its proper divisors (776485).

1121478539 is an equidigital number, since it uses as much as digits as its factorization.

1121478539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776484.

The product of its digits is 60480, while the sum is 41.

The square root of 1121478539 is about 33488.4836772285. The cubic root of 1121478539 is about 1038.9556018691.

The spelling of 1121478539 in words is "one billion, one hundred twenty-one million, four hundred seventy-eight thousand, five hundred thirty-nine".