144749 has 4 divisors (see below), whose sum is σ = 157920. Its totient is φ = 131580.

The previous prime is 144737. The next prime is 144751. The reversal of 144749 is 947441.

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, and also an emirpimes, since its reverse is a distinct semiprime: 947441 = 11 ⋅86131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144749 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144709) 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, 6569 + ... + 6590.

It is an arithmetic number, because the mean of its divisors is an integer number (39480).

2¹⁴⁴⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

144749 is a deficient number, since it is larger than the sum of its proper divisors (13171).

144749 is a wasteful number, since it uses less digits than its factorization.

144749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13170.

The product of its digits is 4032, while the sum is 29.

The square root of 144749 is about 380.4589333949. The cubic root of 144749 is about 52.5055474108.

The spelling of 144749 in words is "one hundred forty-four thousand, seven hundred forty-nine".