1043400641 has 2 divisors, whose sum is σ = 1043400642. Its totient is φ = 1043400640.

The previous prime is 1043400587. The next prime is 1043400643. The reversal of 1043400641 is 1460043401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 949872400 + 93528241 = 30820^2 + 9671^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1043400641 is a prime.

Together with 1043400643, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1043400643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521700320 + 521700321.

It is an arithmetic number, because the mean of its divisors is an integer number (521700321).

Almost surely, 2^1043400641 is an apocalyptic number.

It is an amenable number.

1043400641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1043400641 is an equidigital number, since it uses as much as digits as its factorization.

1043400641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1043400641 is about 32301.7126635725. The cubic root of 1043400641 is about 1014.2624944978.

The spelling of 1043400641 in words is "one billion, forty-three million, four hundred thousand, six hundred forty-one".