1215780122 has 8 divisors (see below), whose sum is σ = 1824901056. Its totient is φ = 607479772.

The previous prime is 1215780121. The next prime is 1215780133. The reversal of 1215780122 is 2210875121.

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 (1215780121) 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, 201428 + ... + 207375.

It is an arithmetic number, because the mean of its divisors is an integer number (228112632).

Almost surely, 2^1215780122 is an apocalyptic number.

1215780122 is a deficient number, since it is larger than the sum of its proper divisors (609120934).

1215780122 is a wasteful number, since it uses less digits than its factorization.

1215780122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410292.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 1215780122 is about 34868.0386887476. The cubic root of 1215780122 is about 1067.2963219685.

The spelling of 1215780122 in words is "one billion, two hundred fifteen million, seven hundred eighty thousand, one hundred twenty-two".