145023439 has 16 divisors (see below), whose sum is σ = 160876800. Its totient is φ = 129634560.

The previous prime is 145023421. The next prime is 145023491. The reversal of 145023439 is 934320541.

145023439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145023439 - 2⁵ = 145023407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145023439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145023499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211992 + ... + 212674.

It is an arithmetic number, because the mean of its divisors is an integer number (10054800).

Almost surely, 2^145023439 is an apocalyptic number.

145023439 is a deficient number, since it is larger than the sum of its proper divisors (15853361).

145023439 is a wasteful number, since it uses less digits than its factorization.

145023439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 145023439 is about 12042.5677909655. The cubic root of 145023439 is about 525.3870935048.

The spelling of 145023439 in words is "one hundred forty-five million, twenty-three thousand, four hundred thirty-nine".