145603 has 2 divisors, whose sum is σ = 145604. Its totient is φ = 145602.

The previous prime is 145601. The next prime is 145633. The reversal of 145603 is 306541.

It is a weak prime.

It is an emirp because it is prime and its reverse (306541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145603 - 2¹ = 145601 is a prime.

Together with 145601, it forms a pair of twin primes.

145603 is a lucky number.

It is equal to p₁₃₄₇₄ and since 145603 and 13474 have the same sum of digits, it is a Honaker prime.

It is a zygodrome in base 7.

It is not a weakly prime, because it can be changed into another prime (145601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72801 + 72802.

It is an arithmetic number, because the mean of its divisors is an integer number (72802).

2¹⁴⁵⁶⁰³ is an apocalyptic number.

145603 is a deficient number, since it is larger than the sum of its proper divisors (1).

145603 is an equidigital number, since it uses as much as digits as its factorization.

145603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 145603 is about 381.5796116147. The cubic root of 145603 is about 52.6086036036.

The spelling of 145603 in words is "one hundred forty-five thousand, six hundred three".