1231488 has 48 divisors (see below), whose sum is σ = 3547050. Its totient is φ = 410112.

The previous prime is 1231487. The next prime is 1231511. The reversal of 1231488 is 8841321.

It can be written as a sum of positive squares in only one way, i.e., 1065024 + 166464 = 1032^2 + 408^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1231481) 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 5 ways as a sum of consecutive naturals, for example, 618 + ... + 1686.

2^1231488 is an apocalyptic number.

1231488 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 1231488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1773525).

1231488 is an abundant number, since it is smaller than the sum of its proper divisors (2315562).

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

1231488 is a wasteful number, since it uses less digits than its factorization.

1231488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089 (or 1074 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 1231488 is about 1109.7242900829. The cubic root of 1231488 is about 107.1873156448.

The spelling of 1231488 in words is "one million, two hundred thirty-one thousand, four hundred eighty-eight".