145149 has 4 divisors (see below), whose sum is σ = 193536. Its totient is φ = 96764.

The previous prime is 145139. The next prime is 145177. The reversal of 145149 is 941541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145149 - 2⁴ = 145133 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145109) 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, 24189 + ... + 24194.

It is an arithmetic number, because the mean of its divisors is an integer number (48384).

2¹⁴⁵¹⁴⁹ is an apocalyptic number.

It is an amenable number.

145149 is a deficient number, since it is larger than the sum of its proper divisors (48387).

145149 is an equidigital number, since it uses as much as digits as its factorization.

145149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48386.

The product of its digits is 720, while the sum is 24.

The square root of 145149 is about 380.9842516430. The cubic root of 145149 is about 52.5538676127.

It can be divided in two parts, 1 and 45149, that added together give a triangular number (45150 = T₃₀₀).

The spelling of 145149 in words is "one hundred forty-five thousand, one hundred forty-nine".