1215106005 has 16 divisors (see below), whose sum is σ = 1946551680. Its totient is φ = 647262528.

The previous prime is 1215106001. The next prime is 1215106021. The reversal of 1215106005 is 5006015121.

It is not a de Polignac number, because 1215106005 - 2² = 1215106001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215106001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36870 + ... + 61559.

It is an arithmetic number, because the mean of its divisors is an integer number (121659480).

Almost surely, 2^1215106005 is an apocalyptic number.

1215106005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1215106005 is a deficient number, since it is larger than the sum of its proper divisors (731445675).

1215106005 is an equidigital number, since it uses as much as digits as its factorization.

1215106005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99260.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1215106005 is about 34858.3706589967. The cubic root of 1215106005 is about 1067.0990232408.

The spelling of 1215106005 in words is "one billion, two hundred fifteen million, one hundred six thousand, five".