145209039 has 16 divisors (see below), whose sum is σ = 205065600. Its totient is φ = 91142496.

The previous prime is 145209023. The next prime is 145209041. The reversal of 145209039 is 930902541.

It is not a de Polignac number, because 145209039 - 2⁴ = 145209023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145209049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1477 + ... + 17105.

It is an arithmetic number, because the mean of its divisors is an integer number (12816600).

Almost surely, 2^145209039 is an apocalyptic number.

145209039 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

145209039 is a deficient number, since it is larger than the sum of its proper divisors (59856561).

145209039 is a wasteful number, since it uses less digits than its factorization.

145209039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15814.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 145209039 is about 12050.2713247462. The cubic root of 145209039 is about 525.6111268897.

The spelling of 145209039 in words is "one hundred forty-five million, two hundred nine thousand, thirty-nine".