1020252065 has 16 divisors (see below), whose sum is σ = 1400136192. Its totient is φ = 699134784.

The previous prime is 1020252061. The next prime is 1020252083. The reversal of 1020252065 is 5602520201.

It is a cyclic number.

It is not a de Polignac number, because 1020252065 - 2² = 1020252061 is a prime.

It is a super-2 number, since 2×1020252065² = 2081828552273528450, which contains 22 as substring.

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 1020252065.

It is not an unprimeable number, because it can be changed into a prime (1020252061) by changing a digit.

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, 48392 + ... + 66198.

It is an arithmetic number, because the mean of its divisors is an integer number (87508512).

Almost surely, 2^1020252065 is an apocalyptic number.

It is an amenable number.

1020252065 is a deficient number, since it is larger than the sum of its proper divisors (379884127).

1020252065 is a wasteful number, since it uses less digits than its factorization.

1020252065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19456.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1020252065 is about 31941.3848322204. The cubic root of 1020252065 is about 1006.7056224539.

Adding to 1020252065 its reverse (5602520201), we get a palindrome (6622772266).

The spelling of 1020252065 in words is "one billion, twenty million, two hundred fifty-two thousand, sixty-five".