144072857 has 4 divisors (see below), whose sum is σ = 147966756. Its totient is φ = 140178960.

The previous prime is 144072829. The next prime is 144072871. The reversal of 144072857 is 758270441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 758270441 = 41 ⋅18494401.

It can be written as a sum of positive squares in 2 ways, for example, as 136515856 + 7557001 = 11684^2 + 2749^2 .

It is a cyclic number.

It is not a de Polignac number, because 144072857 - 2⁶ = 144072793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144072857.

It is not an unprimeable number, because it can be changed into a prime (144072457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1946894 + ... + 1946967.

It is an arithmetic number, because the mean of its divisors is an integer number (36991689).

Almost surely, 2^144072857 is an apocalyptic number.

It is an amenable number.

144072857 is a deficient number, since it is larger than the sum of its proper divisors (3893899).

144072857 is an equidigital number, since it uses as much as digits as its factorization.

144072857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3893898.

The product of its (nonzero) digits is 62720, while the sum is 38.

The square root of 144072857 is about 12003.0353244502. The cubic root of 144072857 is about 524.2366617875.

The spelling of 144072857 in words is "one hundred forty-four million, seventy-two thousand, eight hundred fifty-seven".