2155634 has 16 divisors (see below), whose sum is σ = 3687768. Its totient is φ = 936192.

The previous prime is 2155627. The next prime is 2155639. The reversal of 2155634 is 4365512.

It can be written as a sum of positive squares in 4 ways, for example, as 1555009 + 600625 = 1247^2 + 775^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (2155639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1997 + ... + 2880.

2^2155634 is an apocalyptic number.

2155634 is a deficient number, since it is larger than the sum of its proper divisors (1532134).

2155634 is a wasteful number, since it uses less digits than its factorization.

2155634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4909.

The product of its digits is 3600, while the sum is 26.

The square root of 2155634 is about 1468.2077509671. The cubic root of 2155634 is about 129.1789276371.

It can be divided in two parts, 21 and 55634, that added together give a palindrome (55655).

The spelling of 2155634 in words is "two million, one hundred fifty-five thousand, six hundred thirty-four".