145749 has 8 divisors (see below), whose sum is σ = 204640. Its totient is φ = 92016.

The previous prime is 145723. The next prime is 145753. The reversal of 145749 is 947541.

It is a happy number.

145749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145749 - 2¹² = 141653 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 (145709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1222 + ... + 1335.

It is an arithmetic number, because the mean of its divisors is an integer number (25580).

2¹⁴⁵⁷⁴⁹ is an apocalyptic number.

145749 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

145749 is a deficient number, since it is larger than the sum of its proper divisors (58891).

145749 is a wasteful number, since it uses less digits than its factorization.

145749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2579.

The product of its digits is 5040, while the sum is 30.

The square root of 145749 is about 381.7708736926. The cubic root of 145749 is about 52.6261817448.

The spelling of 145749 in words is "one hundred forty-five thousand, seven hundred forty-nine".