2154242 has 8 divisors (see below), whose sum is σ = 3253500. Its totient is φ = 1069744.

The previous prime is 2154241. The next prime is 2154259. The reversal of 2154242 is 2424512.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2105401 + 48841 = 1451^2 + 221^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2154241) 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, 3317 + ... + 3912.

2^2154242 is an apocalyptic number.

2154242 is a deficient number, since it is larger than the sum of its proper divisors (1099258).

2154242 is a wasteful number, since it uses less digits than its factorization.

2154242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7380.

The product of its digits is 640, while the sum is 20.

The square root of 2154242 is about 1467.7336270591. The cubic root of 2154242 is about 129.1511158987.

Adding to 2154242 its reverse (2424512), we get a palindrome (4578754).

The spelling of 2154242 in words is "two million, one hundred fifty-four thousand, two hundred forty-two".