2145256 has 32 divisors (see below), whose sum is σ = 4276800. Its totient is φ = 1006720.

The previous prime is 2145239. The next prime is 2145263. The reversal of 2145256 is 6525412.

2145256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2145256.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16311 + ... + 16441.

It is an arithmetic number, because the mean of its divisors is an integer number (133650).

2^2145256 is an apocalyptic number.

It is an amenable number.

2145256 is a deficient number, since it is larger than the sum of its proper divisors (2131544).

2145256 is a wasteful number, since it uses less digits than its factorization.

2145256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 245 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 2145256 is about 1464.6692459392. The cubic root of 2145256 is about 128.9712894061.

It can be divided in two parts, 2145 and 256, that added together give a 4-th power (2401 = 7⁴).

The spelling of 2145256 in words is "two million, one hundred forty-five thousand, two hundred fifty-six".