1024399 has 2 divisors, whose sum is σ = 1024400. Its totient is φ = 1024398.

The previous prime is 1024391. The next prime is 1024411. The reversal of 1024399 is 9934201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1024399 - 2³ = 1024391 is a prime.

It is a super-2 number, since 2×1024399² = 2098786622402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1024391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512199 + 512200.

It is an arithmetic number, because the mean of its divisors is an integer number (512200).

2^1024399 is an apocalyptic number.

1024399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1024399 is an equidigital number, since it uses as much as digits as its factorization.

1024399 is an evil number, because the sum of its binary digits is even.

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

The square root of 1024399 is about 1012.1259803009. The cubic root of 1024399 is about 100.8067736588.

The spelling of 1024399 in words is "one million, twenty-four thousand, three hundred ninety-nine".