1215140429 has 2 divisors, whose sum is σ = 1215140430. Its totient is φ = 1215140428.

The previous prime is 1215140419. The next prime is 1215140431. The reversal of 1215140429 is 9240415121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1203396100 + 11744329 = 34690^2 + 3427^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215140429 is a prime.

Together with 1215140431, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215140419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607570214 + 607570215.

It is an arithmetic number, because the mean of its divisors is an integer number (607570215).

Almost surely, 2^1215140429 is an apocalyptic number.

It is an amenable number.

1215140429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215140429 is an equidigital number, since it uses as much as digits as its factorization.

1215140429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 1215140429 is about 34858.8644249924. The cubic root of 1215140429 is about 1067.1091001312.

The spelling of 1215140429 in words is "one billion, two hundred fifteen million, one hundred forty thousand, four hundred twenty-nine".