1421315516 has 12 divisors (see below), whose sum is σ = 2488001880. Its totient is φ = 710457840.

The previous prime is 1421315509. The next prime is 1421315543. The reversal of 1421315516 is 6155131241.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33371 + ... + 62898.

It is an arithmetic number, because the mean of its divisors is an integer number (207333490).

Almost surely, 2^1421315516 is an apocalyptic number.

It is an amenable number.

1421315516 is a deficient number, since it is larger than the sum of its proper divisors (1066686364).

1421315516 is a wasteful number, since it uses less digits than its factorization.

1421315516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99964 (or 99962 counting only the distinct ones).

The product of its digits is 3600, while the sum is 29.

The square root of 1421315516 is about 37700.3384069692. The cubic root of 1421315516 is about 1124.3378532506.

Adding to 1421315516 its reverse (6155131241), we get a palindrome (7576446757).

The spelling of 1421315516 in words is "one billion, four hundred twenty-one million, three hundred fifteen thousand, five hundred sixteen".