1215349 has 2 divisors, whose sum is σ = 1215350. Its totient is φ = 1215348.

The previous prime is 1215329. The next prime is 1215359. The reversal of 1215349 is 9435121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1060900 + 154449 = 1030^2 + 393^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215349 - 2¹¹ = 1213301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215329) 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, 607674 + 607675.

It is an arithmetic number, because the mean of its divisors is an integer number (607675).

2^1215349 is an apocalyptic number.

It is an amenable number.

1215349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215349 is an equidigital number, since it uses as much as digits as its factorization.

1215349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 25.

The square root of 1215349 is about 1102.4286825006. The cubic root of 1215349 is about 106.7170150765.

The spelling of 1215349 in words is "one million, two hundred fifteen thousand, three hundred forty-nine".