1043704561 has 4 divisors (see below), whose sum is σ = 1098636400. Its totient is φ = 988772724.

The previous prime is 1043704549. The next prime is 1043704573. The reversal of 1043704561 is 1654073401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1654073401 = 739 ⋅2238259.

It is an interprime number because it is at equal distance from previous prime (1043704549) and next prime (1043704573).

It is a cyclic number.

It is not a de Polignac number, because 1043704561 - 2²⁷ = 909486833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1043704061) 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, 27465891 + ... + 27465928.

It is an arithmetic number, because the mean of its divisors is an integer number (274659100).

Almost surely, 2^1043704561 is an apocalyptic number.

It is an amenable number.

1043704561 is a deficient number, since it is larger than the sum of its proper divisors (54931839).

1043704561 is an equidigital number, since it uses as much as digits as its factorization.

1043704561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54931838.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 1043704561 is about 32306.4167155691. The cubic root of 1043704561 is about 1014.3609625009.

Adding to 1043704561 its reverse (1654073401), we get a palindrome (2697777962).

The spelling of 1043704561 in words is "one billion, forty-three million, seven hundred four thousand, five hundred sixty-one".