155671 has 2 divisors, whose sum is σ = 155672. Its totient is φ = 155670.

The previous prime is 155663. The next prime is 155689. The reversal of 155671 is 176551.

It is a weak prime.

It is an emirp because it is prime and its reverse (176551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155671 - 2³ = 155663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77835 + 77836.

It is an arithmetic number, because the mean of its divisors is an integer number (77836).

2¹⁵⁵⁶⁷¹ is an apocalyptic number.

155671 is a deficient number, since it is larger than the sum of its proper divisors (1).

155671 is an equidigital number, since it uses as much as digits as its factorization.

155671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1050, while the sum is 25.

The square root of 155671 is about 394.5516442749. The cubic root of 155671 is about 53.7942559614.

The spelling of 155671 in words is "one hundred fifty-five thousand, six hundred seventy-one".