1285885941 has 8 divisors (see below), whose sum is σ = 1716586080. Its totient is φ = 856221552.

The previous prime is 1285885927. The next prime is 1285885949. The reversal of 1285885941 is 1495885821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1285885941 - 2¹⁸ = 1285623797 is a prime.

It is a super-2 number, since 2×1285885941² = 3307005306522910962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285885949) 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, 256035 + ... + 261008.

It is an arithmetic number, because the mean of its divisors is an integer number (214573260).

Almost surely, 2^1285885941 is an apocalyptic number.

It is an amenable number.

1285885941 is a deficient number, since it is larger than the sum of its proper divisors (430700139).

1285885941 is an equidigital number, since it uses as much as digits as its factorization.

1285885941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517875.

The product of its digits is 921600, while the sum is 51.

The square root of 1285885941 is about 35859.2518187427. The cubic root of 1285885941 is about 1087.4287627798.

The spelling of 1285885941 in words is "one billion, two hundred eighty-five million, eight hundred eighty-five thousand, nine hundred forty-one".