1332640 has 24 divisors (see below), whose sum is σ = 3148740. Its totient is φ = 532992.

The previous prime is 1332631. The next prime is 1332649. The reversal of 1332640 is 462331.

It is an interprime number because it is at equal distance from previous prime (1332631) and next prime (1332649).

It can be written as a sum of positive squares in 2 ways, for example, as 1227664 + 104976 = 1108^2 + 324^2 .

It is not an unprimeable number, because it can be changed into a prime (1332649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4005 + ... + 4324.

2^1332640 is an apocalyptic number.

1332640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1332640 is an abundant number, since it is smaller than the sum of its proper divisors (1816100).

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

1332640 is an equidigital number, since it uses as much as digits as its factorization.

1332640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8344 (or 8336 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1332640 is about 1154.4002772002. The cubic root of 1332640 is about 110.0451605202.

Adding to 1332640 its reverse (462331), we get a palindrome (1794971).

It can be divided in two parts, 13326 and 40, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 1332640 in words is "one million, three hundred thirty-two thousand, six hundred forty".