1154987 has 2 divisors, whose sum is σ = 1154988. Its totient is φ = 1154986.

The previous prime is 1154971. The next prime is 1155001. The reversal of 1154987 is 7894511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1154987 - 2⁴ = 1154971 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1154927) by changing a digit.

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 as a sum of consecutive naturals, namely, 577493 + 577494.

It is an arithmetic number, because the mean of its divisors is an integer number (577494).

2^1154987 is an apocalyptic number.

1154987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1154987 is an equidigital number, since it uses as much as digits as its factorization.

1154987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 35.

The square root of 1154987 is about 1074.7032148458. The cubic root of 1154987 is about 104.9201812133.

The spelling of 1154987 in words is "one million, one hundred fifty-four thousand, nine hundred eighty-seven".