2144257 has 4 divisors (see below), whose sum is σ = 2152276. Its totient is φ = 2136240.

The previous prime is 2144251. The next prime is 2144269. The reversal of 2144257 is 7524412.

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 404496 + 1739761 = 636^2 + 1319^2 .

It is a cyclic number.

It is not a de Polignac number, because 2144257 - 2³ = 2144249 is a prime.

It is a Duffinian number.

2144257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2144251) 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, 3594 + ... + 4147.

It is an arithmetic number, because the mean of its divisors is an integer number (538069).

It is a Proth number, since it is equal to 1047 ⋅ 2¹¹ + 1 and 1047 < 2¹¹.

2^2144257 is an apocalyptic number.

It is an amenable number.

2144257 is a deficient number, since it is larger than the sum of its proper divisors (8019).

2144257 is an equidigital number, since it uses as much as digits as its factorization.

2144257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8018.

The product of its digits is 2240, while the sum is 25.

The square root of 2144257 is about 1464.3281736004. The cubic root of 2144257 is about 128.9512665707.

Adding to 2144257 its reverse (7524412), we get a palindrome (9668669).

It can be divided in two parts, 2144 and 257, that added together give a 4-th power (2401 = 7⁴).

The spelling of 2144257 in words is "two million, one hundred forty-four thousand, two hundred fifty-seven".