1215439970 has 8 divisors (see below), whose sum is σ = 2187791964. Its totient is φ = 486175984.

The previous prime is 1215439963. The next prime is 1215439993. The reversal of 1215439970 is 799345121.

It can be written as a sum of positive squares in 2 ways, for example, as 1035101929 + 180338041 = 32173^2 + 13429^2 .

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, 60771989 + ... + 60772008.

Almost surely, 2^1215439970 is an apocalyptic number.

1215439970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215439970 is a deficient number, since it is larger than the sum of its proper divisors (972351994).

1215439970 is a wasteful number, since it uses less digits than its factorization.

1215439970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121544004.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 1215439970 is about 34863.1606427186. The cubic root of 1215439970 is about 1067.1967763257.

The spelling of 1215439970 in words is "one billion, two hundred fifteen million, four hundred thirty-nine thousand, nine hundred seventy".