1215013378 has 8 divisors (see below), whose sum is σ = 1826263872. Its totient is φ = 606258756.

The previous prime is 1215013351. The next prime is 1215013381. The reversal of 1215013378 is 8733105121.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 622750 + ... + 624697.

It is an arithmetic number, because the mean of its divisors is an integer number (228282984).

Almost surely, 2^1215013378 is an apocalyptic number.

1215013378 is a deficient number, since it is larger than the sum of its proper divisors (611250494).

1215013378 is a wasteful number, since it uses less digits than its factorization.

1215013378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247936.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 1215013378 is about 34857.0420144911. The cubic root of 1215013378 is about 1067.0719077210.

Adding to 1215013378 its reverse (8733105121), we get a palindrome (9948118499).

The spelling of 1215013378 in words is "one billion, two hundred fifteen million, thirteen thousand, three hundred seventy-eight".