145739 has 4 divisors (see below), whose sum is σ = 159000. Its totient is φ = 132480.

The previous prime is 145723. The next prime is 145753. The reversal of 145739 is 937541.

145739 = T₇₇ + T₇₈ + ... + T₁₀₉.

145739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 145739 - 2⁴ = 145723 is a prime.

It is a super-2 number, since 2×145739² = 42479712242, which contains 22 as substring.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 6614 + ... + 6635.

It is an arithmetic number, because the mean of its divisors is an integer number (39750).

2¹⁴⁵⁷³⁹ is an apocalyptic number.

145739 is a deficient number, since it is larger than the sum of its proper divisors (13261).

145739 is a wasteful number, since it uses less digits than its factorization.

145739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13260.

The product of its digits is 3780, while the sum is 29.

The square root of 145739 is about 381.7577766071. The cubic root of 145739 is about 52.6249781371.

The spelling of 145739 in words is "one hundred forty-five thousand, seven hundred thirty-nine".