1251040 has 48 divisors (see below), whose sum is σ = 3380832. Its totient is φ = 428544.

The previous prime is 1251037. The next prime is 1251043. The reversal of 1251040 is 401521.

It is an interprime number because it is at equal distance from previous prime (1251037) and next prime (1251043).

It is a self number, because there is not a number n which added to its sum of digits gives 1251040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251043) 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, 562 + ... + 1678.

It is an arithmetic number, because the mean of its divisors is an integer number (70434).

2^1251040 is an apocalyptic number.

1251040 is a gapful number since it is divisible by the number (10) 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 1251040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1690416).

1251040 is an abundant number, since it is smaller than the sum of its proper divisors (2129792).

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

1251040 is a wasteful number, since it uses less digits than its factorization.

1251040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139 (or 1131 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 1251040 is about 1118.4989941882. The cubic root of 1251040 is about 107.7516010478.

Adding to 1251040 its reverse (401521), we get a palindrome (1652561).

The spelling of 1251040 in words is "one million, two hundred fifty-one thousand, forty".