1043661061 has 4 divisors (see below), whose sum is σ = 1045404000. Its totient is φ = 1041918124.

The previous prime is 1043661011. The next prime is 1043661103. The reversal of 1043661061 is 1601663401.

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 1043661061 - 2¹⁵ = 1043628293 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 (1043661011) 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, 870571 + ... + 871768.

It is an arithmetic number, because the mean of its divisors is an integer number (261351000).

Almost surely, 2^1043661061 is an apocalyptic number.

It is an amenable number.

1043661061 is a deficient number, since it is larger than the sum of its proper divisors (1742939).

1043661061 is an equidigital number, since it uses as much as digits as its factorization.

1043661061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742938.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1043661061 is about 32305.7434676870. The cubic root of 1043661061 is about 1014.3468699705.

The spelling of 1043661061 in words is "one billion, forty-three million, six hundred sixty-one thousand, sixty-one".