145685605 has 24 divisors (see below), whose sum is σ = 192936168. Its totient is φ = 105520896.

The previous prime is 145685599. The next prime is 145685609. The reversal of 145685605 is 506586541.

It can be written as a sum of positive squares in 12 ways, for example, as 20268004 + 125417601 = 4502^2 + 11199^2 .

It is a de Polignac number, because none of the positive numbers 2^k-145685605 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145685609) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43159 + ... + 46411.

It is an arithmetic number, because the mean of its divisors is an integer number (8039007).

Almost surely, 2^145685605 is an apocalyptic number.

It is an amenable number.

145685605 is a deficient number, since it is larger than the sum of its proper divisors (47250563).

145685605 is a wasteful number, since it uses less digits than its factorization.

145685605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3337 (or 3324 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 40.

The square root of 145685605 is about 12070.0292046043. The cubic root of 145685605 is about 526.1855054180.

The spelling of 145685605 in words is "one hundred forty-five million, six hundred eighty-five thousand, six hundred five".