1824121 has 4 divisors (see below), whose sum is σ = 1964452. Its totient is φ = 1683792.

The previous prime is 1824113. The next prime is 1824139. The reversal of 1824121 is 1214281.

It is a happy number.

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 1166400 + 657721 = 1080^2 + 811^2 .

It is a cyclic number.

It is not a de Polignac number, because 1824121 - 2³ = 1824113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1824421) 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, 70146 + ... + 70171.

It is an arithmetic number, because the mean of its divisors is an integer number (491113).

2^1824121 is an apocalyptic number.

It is an amenable number.

1824121 is a deficient number, since it is larger than the sum of its proper divisors (140331).

1824121 is a wasteful number, since it uses less digits than its factorization.

1824121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140330.

The product of its digits is 128, while the sum is 19.

The square root of 1824121 is about 1350.6002369317. The cubic root of 1824121 is about 122.1849965910.

The spelling of 1824121 in words is "one million, eight hundred twenty-four thousand, one hundred twenty-one".