1040042124391 has 2 divisors, whose sum is σ = 1040042124392. Its totient is φ = 1040042124390.

The previous prime is 1040042124389. The next prime is 1040042124413. The reversal of 1040042124391 is 1934212400401.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1040042124391 - 2¹ = 1040042124389 is a prime.

Together with 1040042124389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040042124301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520021062195 + 520021062196.

It is an arithmetic number, because the mean of its divisors is an integer number (520021062196).

Almost surely, 2^{1040042124391} is an apocalyptic number.

1040042124391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040042124391 is an equidigital number, since it uses as much as digits as its factorization.

1040042124391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

Adding to 1040042124391 its reverse (1934212400401), we get a palindrome (2974254524792).

The spelling of 1040042124391 in words is "one trillion, forty billion, forty-two million, one hundred twenty-four thousand, three hundred ninety-one".