145751545 has 4 divisors (see below), whose sum is σ = 174901860. Its totient is φ = 116601232.

The previous prime is 145751533. The next prime is 145751549. The reversal of 145751545 is 545157541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56430144 + 89321401 = 7512^2 + 9451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145751545 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145751549) 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, 14575150 + ... + 14575159.

It is an arithmetic number, because the mean of its divisors is an integer number (43725465).

Almost surely, 2^145751545 is an apocalyptic number.

It is an amenable number.

145751545 is a deficient number, since it is larger than the sum of its proper divisors (29150315).

145751545 is an equidigital number, since it uses as much as digits as its factorization.

145751545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29150314.

The product of its digits is 70000, while the sum is 37.

The square root of 145751545 is about 12072.7604548421. The cubic root of 145751545 is about 526.2648805417.

The spelling of 145751545 in words is "one hundred forty-five million, seven hundred fifty-one thousand, five hundred forty-five".