1005121513 has 8 divisors (see below), whose sum is σ = 1106745120. Its totient is φ = 905206080.

The previous prime is 1005121501. The next prime is 1005121531. The reversal of 1005121513 is 3151215001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1005121513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1005121813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425808 + ... + 428161.

It is an arithmetic number, because the mean of its divisors is an integer number (138343140).

Almost surely, 2^1005121513 is an apocalyptic number.

It is an amenable number.

1005121513 is a deficient number, since it is larger than the sum of its proper divisors (101623607).

1005121513 is a wasteful number, since it uses less digits than its factorization.

1005121513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854087.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 1005121513 is about 31703.6514143087. The cubic root of 1005121513 is about 1001.7042648314.

Adding to 1005121513 its reverse (3151215001), we get a palindrome (4156336514).

The spelling of 1005121513 in words is "one billion, five million, one hundred twenty-one thousand, five hundred thirteen".