1242079 has 4 divisors (see below), whose sum is σ = 1244320. Its totient is φ = 1239840.

The previous prime is 1242067. The next prime is 1242089. The reversal of 1242079 is 9702421.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1242079 - 2⁷ = 1241951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394 + ... + 1624.

It is an arithmetic number, because the mean of its divisors is an integer number (311080).

2^1242079 is an apocalyptic number.

1242079 is a deficient number, since it is larger than the sum of its proper divisors (2241).

1242079 is a wasteful number, since it uses less digits than its factorization.

1242079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1242079 is about 1114.4859801720. The cubic root of 1242079 is about 107.4937151545.

The spelling of 1242079 in words is "one million, two hundred forty-two thousand, seventy-nine".