1251568 has 40 divisors (see below), whose sum is σ = 2678400. Its totient is φ = 563904.

The previous prime is 1251533. The next prime is 1251571. The reversal of 1251568 is 8651521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6903 + ... + 7081.

It is an arithmetic number, because the mean of its divisors is an integer number (66960).

2^1251568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1251568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1339200).

1251568 is an abundant number, since it is smaller than the sum of its proper divisors (1426832).

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

1251568 is a wasteful number, since it uses less digits than its factorization.

1251568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229 (or 223 counting only the distinct ones).

The product of its digits is 2400, while the sum is 28.

The square root of 1251568 is about 1118.7349998994. The cubic root of 1251568 is about 107.7667577290.

It can be divided in two parts, 12 and 51568, that multiplied together give a palindrome (618816).

The spelling of 1251568 in words is "one million, two hundred fifty-one thousand, five hundred sixty-eight".