145478539 has 4 divisors (see below), whose sum is σ = 146891056. Its totient is φ = 144066024.

The previous prime is 145478521. The next prime is 145478549. The reversal of 145478539 is 935874541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 935874541 = 7 ⋅133696363.

It is a cyclic number.

It is not a de Polignac number, because 145478539 - 2¹¹ = 145476491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145478549) 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, 706104 + ... + 706309.

It is an arithmetic number, because the mean of its divisors is an integer number (36722764).

Almost surely, 2^145478539 is an apocalyptic number.

145478539 is a deficient number, since it is larger than the sum of its proper divisors (1412517).

145478539 is a wasteful number, since it uses less digits than its factorization.

145478539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412516.

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

The square root of 145478539 is about 12061.4484619386. The cubic root of 145478539 is about 525.9360943918.

The spelling of 145478539 in words is "one hundred forty-five million, four hundred seventy-eight thousand, five hundred thirty-nine".