145457839 has 4 divisors (see below), whose sum is σ = 145506456. Its totient is φ = 145409224.

The previous prime is 145457813. The next prime is 145457849. The reversal of 145457839 is 938754541.

145457839 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 145457839 - 2⁹ = 145457327 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 (145457849) 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, 19504 + ... + 25909.

It is an arithmetic number, because the mean of its divisors is an integer number (36376614).

Almost surely, 2^145457839 is an apocalyptic number.

145457839 is a deficient number, since it is larger than the sum of its proper divisors (48617).

145457839 is an equidigital number, since it uses as much as digits as its factorization.

145457839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48616.

The product of its digits is 604800, while the sum is 46.

The square root of 145457839 is about 12060.5903255189. The cubic root of 145457839 is about 525.9111482299.

The spelling of 145457839 in words is "one hundred forty-five million, four hundred fifty-seven thousand, eight hundred thirty-nine".