155345 has 4 divisors (see below), whose sum is σ = 186420. Its totient is φ = 124272.

The previous prime is 155333. The next prime is 155371. The reversal of 155345 is 543551.

Added to its reverse (543551) it gives a square (698896 = 836²).

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

It can be written as a sum of positive squares in 2 ways, for example, as 71824 + 83521 = 268^2 + 289^2 .

It is a cyclic number.

It is not a de Polignac number, because 155345 - 2¹⁰ = 154321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155345.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15530 + ... + 15539.

It is an arithmetic number, because the mean of its divisors is an integer number (46605).

2¹⁵⁵³⁴⁵ is an apocalyptic number.

It is an amenable number.

155345 is a deficient number, since it is larger than the sum of its proper divisors (31075).

155345 is an equidigital number, since it uses as much as digits as its factorization.

155345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31074.

The product of its digits is 1500, while the sum is 23.

The square root of 155345 is about 394.1383006002. The cubic root of 155345 is about 53.7566784563.

Adding to 155345 its reverse (543551), we get a palindrome (698896).

The spelling of 155345 in words is "one hundred fifty-five thousand, three hundred forty-five".