145727643 has 4 divisors (see below), whose sum is σ = 194303528. Its totient is φ = 97151760.

The previous prime is 145727641. The next prime is 145727657. The reversal of 145727643 is 346727541.

145727643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346727541 = 3 ⋅115575847.

It is not a de Polignac number, because 145727643 - 2¹ = 145727641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145727641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24287938 + ... + 24287943.

It is an arithmetic number, because the mean of its divisors is an integer number (48575882).

Almost surely, 2^145727643 is an apocalyptic number.

145727643 is a deficient number, since it is larger than the sum of its proper divisors (48575885).

145727643 is an equidigital number, since it uses as much as digits as its factorization.

145727643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48575884.

The product of its digits is 141120, while the sum is 39.

The square root of 145727643 is about 12071.7704998066. The cubic root of 145727643 is about 526.2361113307.

The spelling of 145727643 in words is "one hundred forty-five million, seven hundred twenty-seven thousand, six hundred forty-three".