426399 has 8 divisors (see below), whose sum is σ = 575280. Its totient is φ = 280896.

The previous prime is 426389. The next prime is 426401. The reversal of 426399 is 993624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 426399 - 2⁴ = 426383 is a prime.

It is a super-2 number, since 2×426399² = 363632214402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532 + ... + 1065.

It is an arithmetic number, because the mean of its divisors is an integer number (71910).

2⁴²⁶³⁹⁹ is an apocalyptic number.

426399 is a deficient number, since it is larger than the sum of its proper divisors (148881).

426399 is a wasteful number, since it uses less digits than its factorization.

426399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689.

The product of its digits is 11664, while the sum is 33.

The square root of 426399 is about 652.9923429873. The cubic root of 426399 is about 75.2671362687.

It can be divided in two parts, 42 and 6399, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 426399 in words is "four hundred twenty-six thousand, three hundred ninety-nine".