144147857 has 12 divisors (see below), whose sum is σ = 168618996. Its totient is φ = 122865120.

The previous prime is 144147853. The next prime is 144147929. The reversal of 144147857 is 758741441.

It can be written as a sum of positive squares in 2 ways, for example, as 38551681 + 105596176 = 6209^2 + 10276^2 .

It is not a de Polignac number, because 144147857 - 2² = 144147853 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (144147853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 743 + ... + 16995.

It is an arithmetic number, because the mean of its divisors is an integer number (14051583).

Almost surely, 2^144147857 is an apocalyptic number.

It is an amenable number.

144147857 is a deficient number, since it is larger than the sum of its proper divisors (24471139).

144147857 is a wasteful number, since it uses less digits than its factorization.

144147857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16448 (or 16441 counting only the distinct ones).

The product of its digits is 125440, while the sum is 41.

The square root of 144147857 is about 12006.1591277144. The cubic root of 144147857 is about 524.3276132915.

The spelling of 144147857 in words is "one hundred forty-four million, one hundred forty-seven thousand, eight hundred fifty-seven".