145216727 has 4 divisors (see below), whose sum is σ = 145977216. Its totient is φ = 144456240.

The previous prime is 145216723. The next prime is 145216739. The reversal of 145216727 is 727612541.

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

It is a cyclic number.

It is not a de Polignac number, because 145216727 - 2² = 145216723 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145216723) 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, 379958 + ... + 380339.

It is an arithmetic number, because the mean of its divisors is an integer number (36494304).

Almost surely, 2^145216727 is an apocalyptic number.

145216727 is a deficient number, since it is larger than the sum of its proper divisors (760489).

145216727 is an equidigital number, since it uses as much as digits as its factorization.

145216727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760488.

The product of its digits is 23520, while the sum is 35.

The square root of 145216727 is about 12050.5903174907. The cubic root of 145216727 is about 525.6204027747.

The spelling of 145216727 in words is "one hundred forty-five million, two hundred sixteen thousand, seven hundred twenty-seven".