1215370253 has 2 divisors, whose sum is σ = 1215370254. Its totient is φ = 1215370252.

The previous prime is 1215370249. The next prime is 1215370259. The reversal of 1215370253 is 3520735121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1055145289 + 160224964 = 32483^2 + 12658^2 .

It is an emirp because it is prime and its reverse (3520735121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1215370253 - 2² = 1215370249 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215370259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607685126 + 607685127.

It is an arithmetic number, because the mean of its divisors is an integer number (607685127).

Almost surely, 2^1215370253 is an apocalyptic number.

It is an amenable number.

1215370253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215370253 is an equidigital number, since it uses as much as digits as its factorization.

1215370253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 1215370253 is about 34862.1607620641. The cubic root of 1215370253 is about 1067.1763713195.

The spelling of 1215370253 in words is "one billion, two hundred fifteen million, three hundred seventy thousand, two hundred fifty-three".