155487 has 4 divisors (see below), whose sum is σ = 207320. Its totient is φ = 103656.

The previous prime is 155473. The next prime is 155501. The reversal of 155487 is 784551.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (155473) and next prime (155501).

It is not a de Polignac number, because 155487 - 2⁶ = 155423 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155087) 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 in 3 ways as a sum of consecutive naturals, for example, 25912 + ... + 25917.

It is an arithmetic number, because the mean of its divisors is an integer number (51830).

2¹⁵⁵⁴⁸⁷ is an apocalyptic number.

155487 is a deficient number, since it is larger than the sum of its proper divisors (51833).

155487 is an equidigital number, since it uses as much as digits as its factorization.

155487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51832.

The product of its digits is 5600, while the sum is 30.

The square root of 155487 is about 394.3183992664. The cubic root of 155487 is about 53.7730530282.

The spelling of 155487 in words is "one hundred fifty-five thousand, four hundred eighty-seven".