1022065561 has 8 divisors (see below), whose sum is σ = 1126021248. Its totient is φ = 919950000.

The previous prime is 1022065549. The next prime is 1022065607. The reversal of 1022065561 is 1655602201.

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 1022065561 - 2⁷ = 1022065433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1022065511) 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, 458865 + ... + 461086.

It is an arithmetic number, because the mean of its divisors is an integer number (140752656).

Almost surely, 2^1022065561 is an apocalyptic number.

1022065561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1022065561 is a deficient number, since it is larger than the sum of its proper divisors (103955687).

1022065561 is a wasteful number, since it uses less digits than its factorization.

1022065561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920063.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1022065561 is about 31969.7601023217. The cubic root of 1022065561 is about 1007.3017418015.

Adding to 1022065561 its reverse (1655602201), we get a palindrome (2677667762).

The spelling of 1022065561 in words is "one billion, twenty-two million, sixty-five thousand, five hundred sixty-one".