1215641146 has 8 divisors (see below), whose sum is σ = 1823722164. Its totient is φ = 607733760.

The previous prime is 1215641143. The next prime is 1215641159. The reversal of 1215641146 is 6411465121.

It can be written as a sum of positive squares in 2 ways, for example, as 1078399921 + 137241225 = 32839^2 + 11715^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1215641143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24205 + ... + 54928.

Almost surely, 2^1215641146 is an apocalyptic number.

1215641146 is a deficient number, since it is larger than the sum of its proper divisors (608081018).

1215641146 is an equidigital number, since it uses as much as digits as its factorization.

1215641146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86816.

The product of its digits is 5760, while the sum is 31.

The square root of 1215641146 is about 34866.0457465426. The cubic root of 1215641146 is about 1067.2556528203.

The spelling of 1215641146 in words is "one billion, two hundred fifteen million, six hundred forty-one thousand, one hundred forty-six".