1043554561 has 4 divisors (see below), whose sum is σ = 1192633792. Its totient is φ = 894475332.

The previous prime is 1043554553. The next prime is 1043554579. The reversal of 1043554561 is 1654553401.

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.

It is a cyclic number.

It is not a de Polignac number, because 1043554561 - 2³ = 1043554553 is a prime.

It is a super-2 number, since 2×1043554561² = 2178012243567805442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1043554361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74539605 + ... + 74539618.

It is an arithmetic number, because the mean of its divisors is an integer number (298158448).

Almost surely, 2^1043554561 is an apocalyptic number.

It is an amenable number.

1043554561 is a deficient number, since it is larger than the sum of its proper divisors (149079231).

1043554561 is an equidigital number, since it uses as much as digits as its factorization.

1043554561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149079230.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 1043554561 is about 32304.0951119204. The cubic root of 1043554561 is about 1014.3123659153.

The spelling of 1043554561 in words is "one billion, forty-three million, five hundred fifty-four thousand, five hundred sixty-one".