2140456 has 8 divisors (see below), whose sum is σ = 4013370. Its totient is φ = 1070224.

The previous prime is 2140447. The next prime is 2140459. The reversal of 2140456 is 6540412.

It can be written as a sum of positive squares in only one way, i.e., 2056356 + 84100 = 1434^2 + 290^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (2140459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133771 + ... + 133786.

2^2140456 is an apocalyptic number.

It is an amenable number.

2140456 is a deficient number, since it is larger than the sum of its proper divisors (1872914).

2140456 is a wasteful number, since it uses less digits than its factorization.

2140456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267563 (or 267559 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2140456 is about 1463.0297331223. The cubic root of 2140456 is about 128.8750266943.

Adding to 2140456 its reverse (6540412), we get a palindrome (8680868).

The spelling of 2140456 in words is "two million, one hundred forty thousand, four hundred fifty-six".