2155434 has 16 divisors (see below), whose sum is σ = 4341600. Its totient is φ = 713360.

The previous prime is 2155429. The next prime is 2155451. The reversal of 2155434 is 4345512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312 + ... + 2099.

It is an arithmetic number, because the mean of its divisors is an integer number (271350).

2^2155434 is an apocalyptic number.

2155434 is an abundant number, since it is smaller than the sum of its proper divisors (2186166).

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

2155434 is a wasteful number, since it uses less digits than its factorization.

2155434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565.

The product of its digits is 2400, while the sum is 24.

The square root of 2155434 is about 1468.1396391352. The cubic root of 2155434 is about 129.1749324344.

It can be divided in two parts, 21 and 55434, that added together give a palindrome (55455).

The spelling of 2155434 in words is "two million, one hundred fifty-five thousand, four hundred thirty-four".