1305685452 has 24 divisors (see below), whose sum is σ = 3128940976. Its totient is φ = 423465408.

The previous prime is 1305685393. The next prime is 1305685463. The reversal of 1305685452 is 2545865031.

It is a self number, because there is not a number n which added to its sum of digits gives 1305685452.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1469923 + ... + 1470810.

Almost surely, 2^1305685452 is an apocalyptic number.

1305685452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1305685452 is an abundant number, since it is smaller than the sum of its proper divisors (1823255524).

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

1305685452 is a wasteful number, since it uses less digits than its factorization.

1305685452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2940777 (or 2940775 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

The square root of 1305685452 is about 36134.2697726134. The cubic root of 1305685452 is about 1092.9816107468.

The spelling of 1305685452 in words is "one billion, three hundred five million, six hundred eighty-five thousand, four hundred fifty-two".