1232640 has 108 divisors (see below), whose sum is σ = 4304664. Its totient is φ = 325632.

The previous prime is 1232617. The next prime is 1232657. The reversal of 1232640 is 462321.

It is a happy number.

1232640 is a `hidden beast` number, since 1 + 23 + 2 + 640 = 666.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11467 + ... + 11573.

It is an arithmetic number, because the mean of its divisors is an integer number (39858).

2^1232640 is an apocalyptic number.

1232640 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 1232640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2152332).

1232640 is an abundant number, since it is smaller than the sum of its proper divisors (3072024).

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

1232640 is a wasteful number, since it uses less digits than its factorization.

1232640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1232640 is about 1110.2432165972. The cubic root of 1232640 is about 107.2207281518.

Adding to 1232640 its reverse (462321), we get a palindrome (1694961).

The spelling of 1232640 in words is "one million, two hundred thirty-two thousand, six hundred forty".