145744 has 10 divisors (see below), whose sum is σ = 282410. Its totient is φ = 72864.

The previous prime is 145723. The next prime is 145753. The reversal of 145744 is 447541.

It can be written as a sum of positive squares in only one way, i.e., 97344 + 48400 = 312^2 + 220^2 .

It is a congruent number.

It is an unprimeable number.

145744 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 4539 + ... + 4570.

It is an arithmetic number, because the mean of its divisors is an integer number (28241).

2¹⁴⁵⁷⁴⁴ is an apocalyptic number.

It is an amenable number.

145744 is a deficient number, since it is larger than the sum of its proper divisors (136666).

145744 is an equidigital number, since it uses as much as digits as its factorization.

145744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9117 (or 9111 counting only the distinct ones).

The product of its digits is 2240, while the sum is 25.

The square root of 145744 is about 381.7643252060. The cubic root of 145744 is about 52.6255799478.

It can be divided in two parts, 145 and 744, that multiplied together give a triangular number (107880 = T₄₆₄).

The spelling of 145744 in words is "one hundred forty-five thousand, seven hundred forty-four".