1215243246 has 32 divisors (see below), whose sum is σ = 2798915328. Its totient is φ = 344560320.

The previous prime is 1215243241. The next prime is 1215243247. The reversal of 1215243246 is 6423425121.

It is a super-2 number, since 2×1215243246² = 2953632293897233032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215243241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104935 + ... + 115938.

It is an arithmetic number, because the mean of its divisors is an integer number (87466104).

Almost surely, 2^1215243246 is an apocalyptic number.

1215243246 is an abundant number, since it is smaller than the sum of its proper divisors (1583672082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215243246 is a wasteful number, since it uses less digits than its factorization.

1215243246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221016.

The product of its digits is 11520, while the sum is 30.

The square root of 1215243246 is about 34860.3391549767. The cubic root of 1215243246 is about 1067.1391964776.

Adding to 1215243246 its reverse (6423425121), we get a palindrome (7638668367).

The spelling of 1215243246 in words is "one billion, two hundred fifteen million, two hundred forty-three thousand, two hundred forty-six".