1020405513 has 8 divisors (see below), whose sum is σ = 1407456000. Its totient is φ = 656812688.

The previous prime is 1020405509. The next prime is 1020405541. The reversal of 1020405513 is 3155040201.

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

It is a cyclic number.

It is not a de Polignac number, because 1020405513 - 2² = 1020405509 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020405513.

It is not an unprimeable number, because it can be changed into a prime (1020405563) 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, 5864313 + ... + 5864486.

It is an arithmetic number, because the mean of its divisors is an integer number (175932000).

Almost surely, 2^1020405513 is an apocalyptic number.

It is an amenable number.

1020405513 is a deficient number, since it is larger than the sum of its proper divisors (387050487).

1020405513 is a wasteful number, since it uses less digits than its factorization.

1020405513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11728831.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1020405513 is about 31943.7867667564. The cubic root of 1020405513 is about 1006.7560901196.

Adding to 1020405513 its reverse (3155040201), we get a palindrome (4175445714).

The spelling of 1020405513 in words is "one billion, twenty million, four hundred five thousand, five hundred thirteen".