145665243 has 16 divisors (see below), whose sum is σ = 216548640. Its totient is φ = 96773472.

The previous prime is 145665227. The next prime is 145665257. The reversal of 145665243 is 342566541.

145665243 is a `hidden beast` number, since 1 + 4 + 566 + 52 + 43 = 666.

It is not a de Polignac number, because 145665243 - 2⁴ = 145665227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145665198 and 145665207.

It is not an unprimeable number, because it can be changed into a prime (145664243) 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, 1296 + ... + 17117.

It is an arithmetic number, because the mean of its divisors is an integer number (13534290).

Almost surely, 2^145665243 is an apocalyptic number.

145665243 is a deficient number, since it is larger than the sum of its proper divisors (70883397).

145665243 is a wasteful number, since it uses less digits than its factorization.

145665243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18715 (or 18709 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 145665243 is about 12069.1856808983. The cubic root of 145665243 is about 526.1609898674.

The spelling of 145665243 in words is "one hundred forty-five million, six hundred sixty-five thousand, two hundred forty-three".