1061420065 has 4 divisors (see below), whose sum is σ = 1273704084. Its totient is φ = 849136048.

The previous prime is 1061420057. The next prime is 1061420071. The reversal of 1061420065 is 5600241601.

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 337971456 + 723448609 = 18384^2 + 26897^2 .

It is a cyclic number.

It is not a de Polignac number, because 1061420065 - 2³ = 1061420057 is a prime.

It is a super-2 number, since 2×1061420065² = 2253225108769208450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106142002 + ... + 106142011.

It is an arithmetic number, because the mean of its divisors is an integer number (318426021).

Almost surely, 2^1061420065 is an apocalyptic number.

It is an amenable number.

1061420065 is a deficient number, since it is larger than the sum of its proper divisors (212284019).

1061420065 is an equidigital number, since it uses as much as digits as its factorization.

1061420065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212284018.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1061420065 is about 32579.4423678491. The cubic root of 1061420065 is about 1020.0679388939.

Adding to 1061420065 its reverse (5600241601), we get a palindrome (6661661666).

The spelling of 1061420065 in words is "one billion, sixty-one million, four hundred twenty thousand, sixty-five".