1152640 has 32 divisors (see below), whose sum is σ = 2757060. Its totient is φ = 460800.

The previous prime is 1152637. The next prime is 1152643. The reversal of 1152640 is 462511.

It is an interprime number because it is at equal distance from previous prime (1152637) and next prime (1152643).

It can be written as a sum of positive squares in 2 ways, for example, as 1065024 + 87616 = 1032^2 + 296^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1152643) 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 3 ways as a sum of consecutive naturals, for example, 261 + ... + 1540.

2^1152640 is an apocalyptic number.

1152640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1152640 is an abundant number, since it is smaller than the sum of its proper divisors (1604420).

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

1152640 is an equidigital number, since it uses as much as digits as its factorization.

1152640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820 (or 1808 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1152640 is about 1073.6107301997. The cubic root of 1152640 is about 104.8490650737.

The spelling of 1152640 in words is "one million, one hundred fifty-two thousand, six hundred forty".