155670 has 16 divisors (see below), whose sum is σ = 373680. Its totient is φ = 41504.

The previous prime is 155663. The next prime is 155671. The reversal of 155670 is 76551.

Added to its reverse (76551) it gives a triangular number (232221 = T₆₈₁).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 155670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2565 + ... + 2624.

It is an arithmetic number, because the mean of its divisors is an integer number (23355).

2¹⁵⁵⁶⁷⁰ is an apocalyptic number.

155670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155670 is an abundant number, since it is smaller than the sum of its proper divisors (218010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155670 is a wasteful number, since it uses less digits than its factorization.

155670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5199.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 155670 is about 394.5503770116. The cubic root of 155670 is about 53.7941407733.

Adding to 155670 its reverse (76551), we get a triangular number (232221 = T₆₈₁).

The spelling of 155670 in words is "one hundred fifty-five thousand, six hundred seventy".