1421315515 has 16 divisors (see below), whose sum is σ = 1808116128. Its totient is φ = 1068857856.

The previous prime is 1421315509. The next prime is 1421315543. The reversal of 1421315515 is 5155131241.

It is a cyclic number.

It is not a de Polignac number, because 1421315515 - 2¹⁵ = 1421282747 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62704 + ... + 82306.

It is an arithmetic number, because the mean of its divisors is an integer number (113007258).

Almost surely, 2^1421315515 is an apocalyptic number.

1421315515 is a deficient number, since it is larger than the sum of its proper divisors (386800613).

1421315515 is a wasteful number, since it uses less digits than its factorization.

1421315515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20478.

The product of its digits is 3000, while the sum is 28.

The square root of 1421315515 is about 37700.3383937068. The cubic root of 1421315515 is about 1124.3378529869.

Adding to 1421315515 its reverse (5155131241), we get a palindrome (6576446756).

The spelling of 1421315515 in words is "one billion, four hundred twenty-one million, three hundred fifteen thousand, five hundred fifteen".