145667 has 4 divisors (see below), whose sum is σ = 150720. Its totient is φ = 140616.

The previous prime is 145661. The next prime is 145679. The reversal of 145667 is 766541.

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

It is a cyclic number.

It is not a de Polignac number, because 145667 - 2⁶ = 145603 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 5023 = 145667 / (1 + 4 + 5 + 6 + 6 + 7).

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145661) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2483 + ... + 2540.

It is an arithmetic number, because the mean of its divisors is an integer number (37680).

2¹⁴⁵⁶⁶⁷ is an apocalyptic number.

145667 is a deficient number, since it is larger than the sum of its proper divisors (5053).

145667 is an equidigital number, since it uses as much as digits as its factorization.

145667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5052.

The product of its digits is 5040, while the sum is 29.

The square root of 145667 is about 381.6634643243. The cubic root of 145667 is about 52.6163105360.

The spelling of 145667 in words is "one hundred forty-five thousand, six hundred sixty-seven".