145531839 has 16 divisors (see below), whose sum is σ = 197759232. Its totient is φ = 95175168.

The previous prime is 145531829. The next prime is 145531871. The reversal of 145531839 is 938135541.

It is not a de Polignac number, because 145531839 - 2¹³ = 145523647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145531797 and 145531806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145531829) 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, 51487 + ... + 54239.

It is an arithmetic number, because the mean of its divisors is an integer number (12359952).

Almost surely, 2^145531839 is an apocalyptic number.

145531839 is a deficient number, since it is larger than the sum of its proper divisors (52227393).

145531839 is a wasteful number, since it uses less digits than its factorization.

145531839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3086.

The product of its digits is 64800, while the sum is 39.

The square root of 145531839 is about 12063.6577786341. The cubic root of 145531839 is about 526.0003168566. Note that the first 3 decimals are identical.

The spelling of 145531839 in words is "one hundred forty-five million, five hundred thirty-one thousand, eight hundred thirty-nine".