1061890 has 8 divisors (see below), whose sum is σ = 1911420. Its totient is φ = 424752.

The previous prime is 1061881. The next prime is 1061897. The reversal of 1061890 is 981601.

It can be written as a sum of positive squares in 2 ways, for example, as 1026169 + 35721 = 1013^2 + 189^2 .

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

It is a super-2 number, since 2×1061890² = 2255220744200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1061897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53085 + ... + 53104.

2^1061890 is an apocalyptic number.

1061890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1061890 is a deficient number, since it is larger than the sum of its proper divisors (849530).

1061890 is a wasteful number, since it uses less digits than its factorization.

1061890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106196.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1061890 is about 1030.4804704603. The cubic root of 1061890 is about 102.0218458911.

The spelling of 1061890 in words is "one million, sixty-one thousand, eight hundred ninety".