1211948515 has 8 divisors (see below), whose sum is σ = 1454735520. Its totient is φ = 969293952.

The previous prime is 1211948489. The next prime is 1211948527. The reversal of 1211948515 is 5158491121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211948515 - 2¹¹ = 1211946467 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11719 + ... + 50608.

It is an arithmetic number, because the mean of its divisors is an integer number (181841940).

Almost surely, 2^1211948515 is an apocalyptic number.

1211948515 is a deficient number, since it is larger than the sum of its proper divisors (242787005).

1211948515 is an equidigital number, since it uses as much as digits as its factorization.

1211948515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66221.

The product of its digits is 14400, while the sum is 37.

The square root of 1211948515 is about 34813.0509292133. The cubic root of 1211948515 is about 1066.1739250304.

The spelling of 1211948515 in words is "one billion, two hundred eleven million, nine hundred forty-eight thousand, five hundred fifteen".