2154256 has 20 divisors (see below), whose sum is σ = 4495372. Its totient is φ = 994176.

The previous prime is 2154241. The next prime is 2154259. The reversal of 2154256 is 6524512.

It can be written as a sum of positive squares in 2 ways, for example, as 665856 + 1488400 = 816^2 + 1220^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2154256.

It is not an unprimeable number, because it can be changed into a prime (2154259) 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, 4971 + ... + 5386.

2^2154256 is an apocalyptic number.

2154256 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2154256 is an abundant number, since it is smaller than the sum of its proper divisors (2341116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2154256 is a wasteful number, since it uses less digits than its factorization.

2154256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10378 (or 10372 counting only the distinct ones).

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

The square root of 2154256 is about 1467.7383963091. The cubic root of 2154256 is about 129.1513956741.

Adding to 2154256 its reverse (6524512), we get a palindrome (8678768).

The spelling of 2154256 in words is "two million, one hundred fifty-four thousand, two hundred fifty-six".