1249879 has 4 divisors (see below), whose sum is σ = 1252800. Its totient is φ = 1246960.

The previous prime is 1249873. The next prime is 1249901. The reversal of 1249879 is 9789421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1249879 - 2⁵ = 1249847 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 (1249873) 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, 679 + ... + 1720.

It is an arithmetic number, because the mean of its divisors is an integer number (313200).

2^1249879 is an apocalyptic number.

1249879 is a deficient number, since it is larger than the sum of its proper divisors (2921).

1249879 is an equidigital number, since it uses as much as digits as its factorization.

1249879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920.

The product of its digits is 36288, while the sum is 40.

The square root of 1249879 is about 1117.9798745952. The cubic root of 1249879 is about 107.7182585681.

The spelling of 1249879 in words is "one million, two hundred forty-nine thousand, eight hundred seventy-nine".