1051986 has 16 divisors (see below), whose sum is σ = 2265984. Its totient is φ = 323664.

The previous prime is 1051979. The next prime is 1051987. The reversal of 1051986 is 6891501.

It is a happy number.

It is a super-2 number, since 2×1051986² = 2213349088392, which contains 22 as substring.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 6666 + ... + 6821.

It is an arithmetic number, because the mean of its divisors is an integer number (141624).

2^1051986 is an apocalyptic number.

1051986 is an abundant number, since it is smaller than the sum of its proper divisors (1213998).

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

1051986 is a wasteful number, since it uses less digits than its factorization.

1051986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13505.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 1051986 is about 1025.6636875702. The cubic root of 1051986 is about 101.7036766924.

The spelling of 1051986 in words is "one million, fifty-one thousand, nine hundred eighty-six".