1042401104891 has 2 divisors, whose sum is σ = 1042401104892. Its totient is φ = 1042401104890.

The previous prime is 1042401104863. The next prime is 1042401104903. The reversal of 1042401104891 is 1984011042401.

It is a strong prime.

It is an emirp because it is prime and its reverse (1984011042401) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1042401104891 is a prime.

It is not a weakly prime, because it can be changed into another prime (1042401104851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521200552445 + 521200552446.

It is an arithmetic number, because the mean of its divisors is an integer number (521200552446).

Almost surely, 2^{1042401104891} is an apocalyptic number.

1042401104891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042401104891 is an equidigital number, since it uses as much as digits as its factorization.

1042401104891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 35.

The spelling of 1042401104891 in words is "one trillion, forty-two billion, four hundred one million, one hundred four thousand, eight hundred ninety-one".