1151987 has 2 divisors, whose sum is σ = 1151988. Its totient is φ = 1151986.

The previous prime is 1151981. The next prime is 1151993. The reversal of 1151987 is 7891511.

It is a balanced prime because it is at equal distance from previous prime (1151981) and next prime (1151993).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1151987 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 (1151981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575993 + 575994.

It is an arithmetic number, because the mean of its divisors is an integer number (575994).

2^1151987 is an apocalyptic number.

1151987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151987 is an equidigital number, since it uses as much as digits as its factorization.

1151987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 32.

The square root of 1151987 is about 1073.3065731654. The cubic root of 1151987 is about 104.8292614424.

The spelling of 1151987 in words is "one million, one hundred fifty-one thousand, nine hundred eighty-seven".