1215884401 has 2 divisors, whose sum is σ = 1215884402. Its totient is φ = 1215884400.

The previous prime is 1215884399. The next prime is 1215884419. The reversal of 1215884401 is 1044885121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1211040000 + 4844401 = 34800^2 + 2201^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215884401 - 2¹ = 1215884399 is a prime.

Together with 1215884399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1215884441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607942200 + 607942201.

It is an arithmetic number, because the mean of its divisors is an integer number (607942201).

Almost surely, 2^1215884401 is an apocalyptic number.

It is an amenable number.

1215884401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215884401 is an equidigital number, since it uses as much as digits as its factorization.

1215884401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10240, while the sum is 34.

The square root of 1215884401 is about 34869.5339945919. The cubic root of 1215884401 is about 1067.3268355483.

The spelling of 1215884401 in words is "one billion, two hundred fifteen million, eight hundred eighty-four thousand, four hundred one".