1285752050 has 54 divisors (see below), whose sum is σ = 2634386727. Its totient is φ = 466532000.

The previous prime is 1285752029. The next prime is 1285752053. The reversal of 1285752050 is 502575821.

It can be written as a sum of positive squares in 5 ways, for example, as 253350889 + 1032401161 = 15917^2 + 32131^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=25355.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1285752050.

It is not an unprimeable number, because it can be changed into a prime (1285752053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2788820 + ... + 2789280.

Almost surely, 2^1285752050 is an apocalyptic number.

1285752050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1285752050 is an abundant number, since it is smaller than the sum of its proper divisors (1348634677).

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

1285752050 is an equidigital number, since it uses as much as digits as its factorization.

1285752050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 35.

The square root of 1285752050 is about 35857.3848739698. The cubic root of 1285752050 is about 1087.3910191580.

The spelling of 1285752050 in words is "one billion, two hundred eighty-five million, seven hundred fifty-two thousand, fifty".