1061658 has 36 divisors (see below), whose sum is σ = 2497950. Its totient is φ = 325728.

The previous prime is 1061651. The next prime is 1061677. The reversal of 1061658 is 8561601.

1061658 is a `hidden beast` number, since 1 + 0 + 6 + 1 + 658 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 660969 + 400689 = 813^2 + 633^2 .

It is a super-2 number, since 2×1061658² = 2254235417928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1061651) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2868 + ... + 3216.

2^1061658 is an apocalyptic number.

1061658 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1061658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1248975).

1061658 is an abundant number, since it is smaller than the sum of its proper divisors (1436292).

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

1061658 is a wasteful number, since it uses less digits than its factorization.

1061658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1061658 is about 1030.3678954626. The cubic root of 1061658 is about 102.0144154943.

It can be divided in two parts, 106 and 1658, that added together give a square (1764 = 42²).

The spelling of 1061658 in words is "one million, sixty-one thousand, six hundred fifty-eight".