1285825750 has 64 divisors (see below), whose sum is σ = 2710775808. Its totient is φ = 452460000.

The previous prime is 1285825699. The next prime is 1285825759. The reversal of 1285825750 is 575285821.

It is a junction number, because it is equal to n+sod(n) for n = 1285825697 and 1285825706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285825759) 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 31 ways as a sum of consecutive naturals, for example, 77709 + ... + 92791.

It is an arithmetic number, because the mean of its divisors is an integer number (42355872).

Almost surely, 2^1285825750 is an apocalyptic number.

1285825750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1285825750 is an abundant number, since it is smaller than the sum of its proper divisors (1424950058).

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

1285825750 is a wasteful number, since it uses less digits than its factorization.

1285825750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15142 (or 15132 counting only the distinct ones).

The product of its (nonzero) digits is 224000, while the sum is 43.

The square root of 1285825750 is about 35858.4125415501. The cubic root of 1285825750 is about 1087.4117953740.

The spelling of 1285825750 in words is "one billion, two hundred eighty-five million, eight hundred twenty-five thousand, seven hundred fifty".