145345239 has 48 divisors (see below), whose sum is σ = 237958560. Its totient is φ = 87609600.

The previous prime is 145345217. The next prime is 145345243. The reversal of 145345239 is 932543541.

It is not a de Polignac number, because 145345239 - 2²⁴ = 128568023 is a prime.

It is a super-2 number, since 2×145345239² = 42250476999934242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145345259) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 241539 + ... + 242139.

It is an arithmetic number, because the mean of its divisors is an integer number (4957470).

Almost surely, 2^145345239 is an apocalyptic number.

145345239 is a deficient number, since it is larger than the sum of its proper divisors (92613321).

145345239 is a wasteful number, since it uses less digits than its factorization.

145345239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689 (or 670 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 145345239 is about 12055.9213252244. The cubic root of 145345239 is about 525.7754092819.

It can be divided in two parts, 1453452 and 39, that multiplied together give a triangular number (56684628 = T₁₀₆₄₇).

The spelling of 145345239 in words is "one hundred forty-five million, three hundred forty-five thousand, two hundred thirty-nine".