1231760 has 40 divisors (see below), whose sum is σ = 2912760. Its totient is φ = 484352.

The previous prime is 1231757. The next prime is 1231771. The reversal of 1231760 is 671321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 183184 + 1048576 = 428^2 + 1024^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 7034 + ... + 7206.

It is an arithmetic number, because the mean of its divisors is an integer number (72819).

2^1231760 is an apocalyptic number.

1231760 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 1231760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1456380).

1231760 is an abundant number, since it is smaller than the sum of its proper divisors (1681000).

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

1231760 is a wasteful number, since it uses less digits than its factorization.

1231760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 1231760 is about 1109.8468362797. The cubic root of 1231760 is about 107.1952065875.

It can be divided in two parts, 1231 and 760, that added together give a palindrome (1991).

The spelling of 1231760 in words is "one million, two hundred thirty-one thousand, seven hundred sixty".