145973 has 4 divisors (see below), whose sum is σ = 148428. Its totient is φ = 143520.

The previous prime is 145969. The next prime is 145987. The reversal of 145973 is 379541.

145973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3844 + 142129 = 62^2 + 377^2 .

It is a cyclic number.

It is not a de Polignac number, because 145973 - 2² = 145969 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1136 + ... + 1257.

It is an arithmetic number, because the mean of its divisors is an integer number (37107).

2¹⁴⁵⁹⁷³ is an apocalyptic number.

It is an amenable number.

145973 is a deficient number, since it is larger than the sum of its proper divisors (2455).

145973 is an equidigital number, since it uses as much as digits as its factorization.

145973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454.

The product of its digits is 3780, while the sum is 29.

The square root of 145973 is about 382.0641307425. The cubic root of 145973 is about 52.6531281407.

The spelling of 145973 in words is "one hundred forty-five thousand, nine hundred seventy-three".