1215061447 has 2 divisors, whose sum is σ = 1215061448. Its totient is φ = 1215061446.

The previous prime is 1215061423. The next prime is 1215061453. The reversal of 1215061447 is 7441605121.

It is a strong prime.

It is an emirp because it is prime and its reverse (7441605121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1215061447 - 2¹¹ = 1215059399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215061847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607530723 + 607530724.

It is an arithmetic number, because the mean of its divisors is an integer number (607530724).

Almost surely, 2^1215061447 is an apocalyptic number.

1215061447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215061447 is an equidigital number, since it uses as much as digits as its factorization.

1215061447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 1215061447 is about 34857.7315240106. The cubic root of 1215061447 is about 1067.0859795560.

Adding to 1215061447 its reverse (7441605121), we get a palindrome (8656666568).

The spelling of 1215061447 in words is "one billion, two hundred fifteen million, sixty-one thousand, four hundred forty-seven".