1249644 has 24 divisors (see below), whose sum is σ = 3181248. Its totient is φ = 378640.

The previous prime is 1249643. The next prime is 1249657. The reversal of 1249644 is 4469421.

It is a super-2 number, since 2×1249644² = 3123220253472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1249643) 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, 4602 + ... + 4865.

It is an arithmetic number, because the mean of its divisors is an integer number (132552).

2^1249644 is an apocalyptic number.

It is an amenable number.

1249644 is an abundant number, since it is smaller than the sum of its proper divisors (1931604).

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

1249644 is a wasteful number, since it uses less digits than its factorization.

1249644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9485 (or 9483 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 1249644 is about 1117.8747693727. The cubic root of 1249644 is about 107.7115071473.

The spelling of 1249644 in words is "one million, two hundred forty-nine thousand, six hundred forty-four".