1121493985 has 4 divisors (see below), whose sum is σ = 1345792788. Its totient is φ = 897195184.

The previous prime is 1121493979. The next prime is 1121494009. The reversal of 1121493985 is 5893941211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5893941211 = 6037 ⋅976303.

It can be written as a sum of positive squares in 2 ways, for example, as 233692369 + 887801616 = 15287^2 + 29796^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121493985 - 2³ = 1121493977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112149394 + ... + 112149403.

It is an arithmetic number, because the mean of its divisors is an integer number (336448197).

Almost surely, 2^1121493985 is an apocalyptic number.

It is an amenable number.

1121493985 is a deficient number, since it is larger than the sum of its proper divisors (224298803).

1121493985 is an equidigital number, since it uses as much as digits as its factorization.

1121493985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224298802.

The product of its digits is 77760, while the sum is 43.

The square root of 1121493985 is about 33488.7142930271. The cubic root of 1121493985 is about 1038.9603716541.

The spelling of 1121493985 in words is "one billion, one hundred twenty-one million, four hundred ninety-three thousand, nine hundred eighty-five".