1282505644 has 24 divisors (see below), whose sum is σ = 2579351040. Its totient is φ = 546572496.

The previous prime is 1282505641. The next prime is 1282505717. The reversal of 1282505644 is 4465052821.

It is not an unprimeable number, because it can be changed into a prime (1282505641) by changing a digit.

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, 122932 + ... + 132955.

It is an arithmetic number, because the mean of its divisors is an integer number (107472960).

Almost surely, 2^1282505644 is an apocalyptic number.

1282505644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1282505644 is an abundant number, since it is smaller than the sum of its proper divisors (1296845396).

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

1282505644 is a wasteful number, since it uses less digits than its factorization.

1282505644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256077 (or 256075 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 37.

The square root of 1282505644 is about 35812.0879592352. The cubic root of 1282505644 is about 1086.4750602907.

The spelling of 1282505644 in words is "one billion, two hundred eighty-two million, five hundred five thousand, six hundred forty-four".