842407 has 2 divisors, whose sum is σ = 842408. Its totient is φ = 842406.

The previous prime is 842399. The next prime is 842417. The reversal of 842407 is 704248.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 842407 - 2³ = 842399 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421203 + 421204.

It is an arithmetic number, because the mean of its divisors is an integer number (421204).

2⁸⁴²⁴⁰⁷ is an apocalyptic number.

842407 is a deficient number, since it is larger than the sum of its proper divisors (1).

842407 is an equidigital number, since it uses as much as digits as its factorization.

842407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 842407 is about 917.8273258081. The cubic root of 842407 is about 94.4439165932.

The spelling of 842407 in words is "eight hundred forty-two thousand, four hundred seven".