1020306145 has 4 divisors (see below), whose sum is σ = 1224367380. Its totient is φ = 816244912.

The previous prime is 1020306121. The next prime is 1020306149. The reversal of 1020306145 is 5416030201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 816130624 + 204175521 = 28568^2 + 14289^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020306145 - 2⁹ = 1020305633 is a prime.

It is a super-2 number, since 2×1020306145² = 2082049259049522050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1020306149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102030610 + ... + 102030619.

It is an arithmetic number, because the mean of its divisors is an integer number (306091845).

Almost surely, 2^1020306145 is an apocalyptic number.

It is an amenable number.

1020306145 is a deficient number, since it is larger than the sum of its proper divisors (204061235).

1020306145 is an equidigital number, since it uses as much as digits as its factorization.

1020306145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204061234.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1020306145 is about 31942.2313716497. The cubic root of 1020306145 is about 1006.7234094564.

Adding to 1020306145 its reverse (5416030201), we get a palindrome (6436336346).

The spelling of 1020306145 in words is "one billion, twenty million, three hundred six thousand, one hundred forty-five".