145555 has 8 divisors (see below), whose sum is σ = 178992. Its totient is φ = 113568.

The previous prime is 145549. The next prime is 145577. The reversal of 145555 is 555541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145555 - 2³ = 145547 is a prime.

It is a Duffinian number.

145555 is a modest number, since divided by 555 gives 145 as remainder.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124 + ... + 553.

It is an arithmetic number, because the mean of its divisors is an integer number (22374).

2¹⁴⁵⁵⁵⁵ is an apocalyptic number.

145555 is a deficient number, since it is larger than the sum of its proper divisors (33437).

145555 is an equidigital number, since it uses as much as digits as its factorization.

145555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725.

The product of its digits is 2500, while the sum is 25.

The square root of 145555 is about 381.5167099879. The cubic root of 145555 is about 52.6028219221.

Subtracting from 145555 its sum of digits (25), we obtain a triangular number (145530 = T₅₃₉).

The spelling of 145555 in words is "one hundred forty-five thousand, five hundred fifty-five".