1253680 has 20 divisors (see below), whose sum is σ = 2914992. Its totient is φ = 501440.

The previous prime is 1253627. The next prime is 1253683. The reversal of 1253680 is 863521.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (1253683) 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, 7756 + ... + 7915.

2^1253680 is an apocalyptic number.

1253680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253680 is an abundant number, since it is smaller than the sum of its proper divisors (1661312).

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

1253680 is a wasteful number, since it uses less digits than its factorization.

1253680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15684 (or 15678 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1253680 is about 1119.6785252920. The cubic root of 1253680 is about 107.8273418621.

The spelling of 1253680 in words is "one million, two hundred fifty-three thousand, six hundred eighty".