1215229 has 2 divisors, whose sum is σ = 1215230. Its totient is φ = 1215228.

The previous prime is 1215209. The next prime is 1215239. The reversal of 1215229 is 9225121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 756900 + 458329 = 870^2 + 677^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215229 - 2⁵ = 1215197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607614 + 607615.

It is an arithmetic number, because the mean of its divisors is an integer number (607615).

2^1215229 is an apocalyptic number.

It is an amenable number.

1215229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215229 is an equidigital number, since it uses as much as digits as its factorization.

1215229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 22.

The square root of 1215229 is about 1102.3742558678. The cubic root of 1215229 is about 106.7135026524.

It can be divided in two parts, 1215 and 229, that added together give a square (1444 = 38²).

The spelling of 1215229 in words is "one million, two hundred fifteen thousand, two hundred twenty-nine".