1051985 has 16 divisors (see below), whose sum is σ = 1423872. Its totient is φ = 739200.

The previous prime is 1051979. The next prime is 1051987. The reversal of 1051985 is 5891501.

It is not a de Polignac number, because 1051985 - 2¹⁰ = 1050961 is a prime.

It is a super-2 number, since 2×1051985² = 2213344880450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1397 + ... + 2013.

It is an arithmetic number, because the mean of its divisors is an integer number (88992).

2^1051985 is an apocalyptic number.

It is an amenable number.

1051985 is a deficient number, since it is larger than the sum of its proper divisors (371887).

1051985 is a wasteful number, since it uses less digits than its factorization.

1051985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664.

The product of its (nonzero) digits is 1800, while the sum is 29.

The square root of 1051985 is about 1025.6632000808. The cubic root of 1051985 is about 101.7036444665.

The spelling of 1051985 in words is "one million, fifty-one thousand, nine hundred eighty-five".