1042399 has 2 divisors, whose sum is σ = 1042400. Its totient is φ = 1042398.

The previous prime is 1042381. The next prime is 1042427. The reversal of 1042399 is 9932401.

It is a happy number.

It is an a-pointer prime, because the next prime (1042427) can be obtained adding 1042399 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1042399 - 2⁷ = 1042271 is a prime.

It is equal to p₈₁₅₈₆ and since 1042399 and 81586 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521199 + 521200.

It is an arithmetic number, because the mean of its divisors is an integer number (521200).

2^1042399 is an apocalyptic number.

1042399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042399 is an equidigital number, since it uses as much as digits as its factorization.

1042399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1042399 is about 1020.9794317223. The cubic root of 1042399 is about 101.3937834240.

It can be divided in two parts, 1042 and 399, that added together give a palindrome (1441).

The spelling of 1042399 in words is "one million, forty-two thousand, three hundred ninety-nine".