1251120 has 80 divisors (see below), whose sum is σ = 4187232. Its totient is φ = 307200.

The previous prime is 1251109. The next prime is 1251121. The reversal of 1251120 is 211521.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1251096 and 1251105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251121) 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, 2920 + ... + 3320.

2^1251120 is an apocalyptic number.

1251120 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 1251120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2093616).

1251120 is an abundant number, since it is smaller than the sum of its proper divisors (2936112).

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

1251120 is a wasteful number, since it uses less digits than its factorization.

1251120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 1251120 is about 1118.5347558301. The cubic root of 1251120 is about 107.7538977888.

Adding to 1251120 its reverse (211521), we get a palindrome (1462641).

The spelling of 1251120 in words is "one million, two hundred fifty-one thousand, one hundred twenty".