1249858 has 16 divisors (see below), whose sum is σ = 2039040. Its totient is φ = 572400.

The previous prime is 1249849. The next prime is 1249861. The reversal of 1249858 is 8589421.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 648 + ... + 1708.

It is an arithmetic number, because the mean of its divisors is an integer number (127440).

2^1249858 is an apocalyptic number.

1249858 is a deficient number, since it is larger than the sum of its proper divisors (789182).

1249858 is a wasteful number, since it uses less digits than its factorization.

1249858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113.

The product of its digits is 23040, while the sum is 37.

The square root of 1249858 is about 1117.9704826157. The cubic root of 1249858 is about 107.7176552841.

The spelling of 1249858 in words is "one million, two hundred forty-nine thousand, eight hundred fifty-eight".