1249638 has 32 divisors (see below), whose sum is σ = 2770656. Its totient is φ = 373248.

The previous prime is 1249631. The next prime is 1249643. The reversal of 1249638 is 8369421.

It is a junction number, because it is equal to n+sod(n) for n = 1249599 and 1249608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2670 + ... + 3102.

It is an arithmetic number, because the mean of its divisors is an integer number (86583).

2^1249638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1249638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1385328).

1249638 is an abundant number, since it is smaller than the sum of its proper divisors (1521018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1249638 is a wasteful number, since it uses less digits than its factorization.

1249638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488.

The product of its digits is 10368, while the sum is 33.

The square root of 1249638 is about 1117.8720857057. The cubic root of 1249638 is about 107.7113347595.

The spelling of 1249638 in words is "one million, two hundred forty-nine thousand, six hundred thirty-eight".