1249668 has 120 divisors (see below), whose sum is σ = 4065600. Its totient is φ = 326592.

The previous prime is 1249657. The next prime is 1249669. The reversal of 1249668 is 8669421.

It is a super-2 number, since 2×1249668² = 3123340220448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1249669) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 43078 + ... + 43106.

It is an arithmetic number, because the mean of its divisors is an integer number (33880).

2^1249668 is an apocalyptic number.

1249668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1249668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2032800).

1249668 is an abundant number, since it is smaller than the sum of its proper divisors (2815932).

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

1249668 is a wasteful number, since it uses less digits than its factorization.

1249668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71 (or 60 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 1249668 is about 1117.8855039761. The cubic root of 1249668 is about 107.7121966929.

The spelling of 1249668 in words is "one million, two hundred forty-nine thousand, six hundred sixty-eight".