2154485 has 4 divisors (see below), whose sum is σ = 2585388. Its totient is φ = 1723584.

The previous prime is 2154419. The next prime is 2154487. The reversal of 2154485 is 5844512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 879844 + 1274641 = 938^2 + 1129^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154485 - 2¹⁶ = 2088949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154487) 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, 215444 + ... + 215453.

It is an arithmetic number, because the mean of its divisors is an integer number (646347).

2^2154485 is an apocalyptic number.

It is an amenable number.

2154485 is a deficient number, since it is larger than the sum of its proper divisors (430903).

2154485 is an equidigital number, since it uses as much as digits as its factorization.

2154485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430902.

The product of its digits is 6400, while the sum is 29.

The square root of 2154485 is about 1467.8164054132. The cubic root of 2154485 is about 129.1559718281.

Adding to 2154485 its reverse (5844512), we get a palindrome (7998997).

The spelling of 2154485 in words is "two million, one hundred fifty-four thousand, four hundred eighty-five".