1121534987 has 12 divisors (see below), whose sum is σ = 1154427120. Its totient is φ = 1089538128.

The previous prime is 1121534971. The next prime is 1121535031. The reversal of 1121534987 is 7894351211.

It is not a de Polignac number, because 1121534987 - 2⁴ = 1121534971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121534287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 362714 + ... + 365792.

It is an arithmetic number, because the mean of its divisors is an integer number (96202260).

Almost surely, 2^1121534987 is an apocalyptic number.

1121534987 is a deficient number, since it is larger than the sum of its proper divisors (32892133).

1121534987 is an equidigital number, since it uses as much as digits as its factorization.

1121534987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3362 (or 3319 counting only the distinct ones).

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

The square root of 1121534987 is about 33489.3264638153. The cubic root of 1121534987 is about 1038.9730330191.

The spelling of 1121534987 in words is "one billion, one hundred twenty-one million, five hundred thirty-four thousand, nine hundred eighty-seven".