1215052427 has 2 divisors, whose sum is σ = 1215052428. Its totient is φ = 1215052426.

The previous prime is 1215052381. The next prime is 1215052429. The reversal of 1215052427 is 7242505121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1215052427 - 2⁸ = 1215052171 is a prime.

Together with 1215052429, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1215052427.

It is not a weakly prime, because it can be changed into another prime (1215052429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607526213 + 607526214.

It is an arithmetic number, because the mean of its divisors is an integer number (607526214).

Almost surely, 2^1215052427 is an apocalyptic number.

1215052427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215052427 is an equidigital number, since it uses as much as digits as its factorization.

1215052427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 1215052427 is about 34857.6021407096. The cubic root of 1215052427 is about 1067.0833390477.

Adding to 1215052427 its reverse (7242505121), we get a palindrome (8457557548).

The spelling of 1215052427 in words is "one billion, two hundred fifteen million, fifty-two thousand, four hundred twenty-seven".