1242879 has 8 divisors (see below), whose sum is σ = 1807872. Its totient is φ = 753240.

The previous prime is 1242869. The next prime is 1242889. The reversal of 1242879 is 9782421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1242869) and next prime (1242889).

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

It is not a de Polignac number, because 1242879 - 2⁸ = 1242623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 37663 = 1242879 / (1 + 2 + 4 + 2 + 8 + 7 + 9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242859) 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, 18799 + ... + 18864.

It is an arithmetic number, because the mean of its divisors is an integer number (225984).

2^1242879 is an apocalyptic number.

1242879 is a deficient number, since it is larger than the sum of its proper divisors (564993).

1242879 is a wasteful number, since it uses less digits than its factorization.

1242879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37677.

The product of its digits is 8064, while the sum is 33.

The square root of 1242879 is about 1114.8448322525. The cubic root of 1242879 is about 107.5167884362.

It can be divided in two parts, 124 and 2879, that added together give a palindrome (3003).

The spelling of 1242879 in words is "one million, two hundred forty-two thousand, eight hundred seventy-nine".