154987 has 6 divisors (see below), whose sum is σ = 180348. Its totient is φ = 132804.

The previous prime is 154981. The next prime is 154991. The reversal of 154987 is 789451.

It is a happy number.

It is not a de Polignac number, because 154987 - 2¹¹ = 152939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (154981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1533 + ... + 1630.

It is an arithmetic number, because the mean of its divisors is an integer number (30058).

2¹⁵⁴⁹⁸⁷ is an apocalyptic number.

154987 is a deficient number, since it is larger than the sum of its proper divisors (25361).

154987 is an equidigital number, since it uses as much as digits as its factorization.

154987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3177 (or 3170 counting only the distinct ones).

The product of its digits is 10080, while the sum is 34.

The square root of 154987 is about 393.6838833379. The cubic root of 154987 is about 53.7153517460.

The spelling of 154987 in words is "one hundred fifty-four thousand, nine hundred eighty-seven".