145742 has 4 divisors (see below), whose sum is σ = 218616. Its totient is φ = 72870.

The previous prime is 145723. The next prime is 145753. The reversal of 145742 is 247541.

145742 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, and also an emirpimes, since its reverse is a distinct semiprime: 247541 = 7 ⋅35363.

It is a congruent number.

It is an unprimeable number.

145742 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36434 + ... + 36437.

It is an arithmetic number, because the mean of its divisors is an integer number (54654).

2¹⁴⁵⁷⁴² is an apocalyptic number.

145742 is a deficient number, since it is larger than the sum of its proper divisors (72874).

145742 is an equidigital number, since it uses as much as digits as its factorization.

145742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72873.

The product of its digits is 1120, while the sum is 23.

The square root of 145742 is about 381.7617057799. The cubic root of 145742 is about 52.6253392252.

The spelling of 145742 in words is "one hundred forty-five thousand, seven hundred forty-two".