145556 has 6 divisors (see below), whose sum is σ = 254730. Its totient is φ = 72776.

The previous prime is 145549. The next prime is 145577. The reversal of 145556 is 655541.

It can be written as a sum of positive squares in only one way, i.e., 144400 + 1156 = 380^2 + 34^2 .

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

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, 18191 + ... + 18198.

It is an arithmetic number, because the mean of its divisors is an integer number (42455).

2¹⁴⁵⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

145556 is a deficient number, since it is larger than the sum of its proper divisors (109174).

145556 is a wasteful number, since it uses less digits than its factorization.

145556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36393 (or 36391 counting only the distinct ones).

The product of its digits is 3000, while the sum is 26.

The square root of 145556 is about 381.5180205442. The cubic root of 145556 is about 52.6029423867.

Subtracting from 145556 its sum of digits (26), we obtain a triangular number (145530 = T₅₃₉).

The spelling of 145556 in words is "one hundred forty-five thousand, five hundred fifty-six".