1061389 has 6 divisors (see below), whose sum is σ = 1234734. Its totient is φ = 909720.

The previous prime is 1061377. The next prime is 1061393. The reversal of 1061389 is 9831601.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 828100 + 233289 = 910^2 + 483^2 .

It is not a de Polignac number, because 1061389 - 2⁷ = 1061261 is a prime.

It is a super-2 number, since 2×1061389² = 2253093218642, 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 (1061189) 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 5 ways as a sum of consecutive naturals, for example, 10782 + ... + 10879.

It is an arithmetic number, because the mean of its divisors is an integer number (205789).

2^1061389 is an apocalyptic number.

It is an amenable number.

1061389 is a deficient number, since it is larger than the sum of its proper divisors (173345).

1061389 is an equidigital number, since it uses as much as digits as its factorization.

1061389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21675 (or 21668 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1061389 is about 1030.2373512934. The cubic root of 1061389 is about 102.0057987220.

The spelling of 1061389 in words is "one million, sixty-one thousand, three hundred eighty-nine".