1215542429 has 2 divisors, whose sum is σ = 1215542430. Its totient is φ = 1215542428.

The previous prime is 1215542417. The next prime is 1215542441. The reversal of 1215542429 is 9242455121.

It is a balanced prime because it is at equal distance from previous prime (1215542417) and next prime (1215542441).

It can be written as a sum of positive squares in only one way, i.e., 1195084900 + 20457529 = 34570^2 + 4523^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215542429 - 2⁴ = 1215542413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215542729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607771214 + 607771215.

It is an arithmetic number, because the mean of its divisors is an integer number (607771215).

Almost surely, 2^1215542429 is an apocalyptic number.

It is an amenable number.

1215542429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215542429 is an equidigital number, since it uses as much as digits as its factorization.

1215542429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 35.

The square root of 1215542429 is about 34864.6300568355. The cubic root of 1215542429 is about 1067.2267629546.

The spelling of 1215542429 in words is "one billion, two hundred fifteen million, five hundred forty-two thousand, four hundred twenty-nine".