1242399 has 8 divisors (see below), whose sum is σ = 1695232. Its totient is φ = 808920.

The previous prime is 1242379. The next prime is 1242403. The reversal of 1242399 is 9932421.

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

It is not a de Polignac number, because 1242399 - 2⁷ = 1242271 is a prime.

It is an Ulam number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4687 + ... + 4944.

It is an arithmetic number, because the mean of its divisors is an integer number (211904).

2^1242399 is an apocalyptic number.

1242399 is a deficient number, since it is larger than the sum of its proper divisors (452833).

1242399 is an equidigital number, since it uses as much as digits as its factorization.

1242399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9677.

The product of its digits is 3888, while the sum is 30.

The square root of 1242399 is about 1114.6295348680. The cubic root of 1242399 is about 107.5029456557.

The spelling of 1242399 in words is "one million, two hundred forty-two thousand, three hundred ninety-nine".