1821450241 has 16 divisors (see below), whose sum is σ = 2040489360. Its totient is φ = 1614332160.

The previous prime is 1821450233. The next prime is 1821450269. The reversal of 1821450241 is 1420541281.

It can be written as a sum of positive squares in 8 ways, for example, as 1107491841 + 713958400 = 33279^2 + 26720^2 .

It is a cyclic number.

It is not a de Polignac number, because 1821450241 - 2³ = 1821450233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1821400241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54891 + ... + 81583.

It is an arithmetic number, because the mean of its divisors is an integer number (127530585).

Almost surely, 2^1821450241 is an apocalyptic number.

It is an amenable number.

1821450241 is a deficient number, since it is larger than the sum of its proper divisors (219039119).

1821450241 is a wasteful number, since it uses less digits than its factorization.

1821450241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26916.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 1821450241 is about 42678.4517174651. The cubic root of 1821450241 is about 1221.2533569658.

The spelling of 1821450241 in words is "one billion, eight hundred twenty-one million, four hundred fifty thousand, two hundred forty-one".