145657305 has 16 divisors (see below), whose sum is σ = 258946560. Its totient is φ = 77683824.

The previous prime is 145657279. The next prime is 145657307. The reversal of 145657305 is 503756541.

It is not a de Polignac number, because 145657305 - 2¹⁰ = 145656281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145657305.

It is not an unprimeable number, because it can be changed into a prime (145657307) 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, 539337 + ... + 539606.

It is an arithmetic number, because the mean of its divisors is an integer number (16184160).

Almost surely, 2^145657305 is an apocalyptic number.

145657305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145657305 is a deficient number, since it is larger than the sum of its proper divisors (113289255).

145657305 is a wasteful number, since it uses less digits than its factorization.

145657305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078957 (or 1078951 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 145657305 is about 12068.8568224169. The cubic root of 145657305 is about 526.1514320124.

The spelling of 145657305 in words is "one hundred forty-five million, six hundred fifty-seven thousand, three hundred five".