145720329 has 16 divisors (see below), whose sum is σ = 207406080. Its totient is φ = 90735120.

The previous prime is 145720321. The next prime is 145720349. The reversal of 145720329 is 923027541.

It is not a de Polignac number, because 145720329 - 2³ = 145720321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145720329.

It is not an unprimeable number, because it can be changed into a prime (145720321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13957 + ... + 22050.

It is an arithmetic number, because the mean of its divisors is an integer number (12962880).

Almost surely, 2^145720329 is an apocalyptic number.

145720329 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

145720329 is a deficient number, since it is larger than the sum of its proper divisors (61685751).

145720329 is a wasteful number, since it uses less digits than its factorization.

145720329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36100.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 145720329 is about 12071.4675578407. The cubic root of 145720329 is about 526.2273073380.

The spelling of 145720329 in words is "one hundred forty-five million, seven hundred twenty thousand, three hundred twenty-nine".