1035256661 has 4 divisors (see below), whose sum is σ = 1035360492. Its totient is φ = 1035152832.

The previous prime is 1035256643. The next prime is 1035256693. The reversal of 1035256661 is 1666525301.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 662032900 + 373223761 = 25730^2 + 19319^2 .

It is a cyclic number.

It is not a de Polignac number, because 1035256661 - 2¹⁴ = 1035240277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1035256561) by changing a digit.

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, 35156 + ... + 57501.

It is an arithmetic number, because the mean of its divisors is an integer number (258840123).

Almost surely, 2^1035256661 is an apocalyptic number.

It is an amenable number.

1035256661 is a deficient number, since it is larger than the sum of its proper divisors (103831).

1035256661 is an equidigital number, since it uses as much as digits as its factorization.

1035256661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103830.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 1035256661 is about 32175.4045973007. The cubic root of 1035256661 is about 1011.6167489222.

The spelling of 1035256661 in words is "one billion, thirty-five million, two hundred fifty-six thousand, six hundred sixty-one".