1215002005 has 16 divisors (see below), whose sum is σ = 1668357504. Its totient is φ = 832109760.

The previous prime is 1215001993. The next prime is 1215002027. The reversal of 1215002005 is 5002005121.

It is not a de Polignac number, because 1215002005 - 2¹⁷ = 1214870933 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1215002005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7594 + ... + 49876.

It is an arithmetic number, because the mean of its divisors is an integer number (104272344).

Almost surely, 2^1215002005 is an apocalyptic number.

It is an amenable number.

1215002005 is a deficient number, since it is larger than the sum of its proper divisors (453355499).

1215002005 is an equidigital number, since it uses as much as digits as its factorization.

1215002005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43116.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1215002005 is about 34856.8788763423. The cubic root of 1215002005 is about 1067.0685783073.

Adding to 1215002005 its reverse (5002005121), we get a palindrome (6217007126).

The spelling of 1215002005 in words is "one billion, two hundred fifteen million, two thousand, five".