1043651641 has 4 divisors (see below), whose sum is σ = 1105042932. Its totient is φ = 982260352.

The previous prime is 1043651633. The next prime is 1043651659. The reversal of 1043651641 is 1461563401.

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 935075241 + 108576400 = 30579^2 + 10420^2 .

It is a cyclic number.

It is not a de Polignac number, because 1043651641 - 2³ = 1043651633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1043651041) 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, 30695620 + ... + 30695653.

It is an arithmetic number, because the mean of its divisors is an integer number (276260733).

Almost surely, 2^1043651641 is an apocalyptic number.

It is an amenable number.

1043651641 is a deficient number, since it is larger than the sum of its proper divisors (61391291).

1043651641 is an equidigital number, since it uses as much as digits as its factorization.

1043651641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61391290.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1043651641 is about 32305.5976728492. The cubic root of 1043651641 is about 1014.3438181571.

The spelling of 1043651641 in words is "one billion, forty-three million, six hundred fifty-one thousand, six hundred forty-one".