1061645 has 8 divisors (see below), whose sum is σ = 1372056. Its totient is φ = 783936.

The previous prime is 1061629. The next prime is 1061647. The reversal of 1061645 is 5461601.

It can be written as a sum of positive squares in 4 ways, for example, as 17161 + 1044484 = 131^2 + 1022^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1061645 - 2⁴ = 1061629 is a prime.

It is a super-3 number, since 3×1061645³ = 3589708726832733375, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1061645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8102 + ... + 8231.

It is an arithmetic number, because the mean of its divisors is an integer number (171507).

2^1061645 is an apocalyptic number.

It is an amenable number.

1061645 is a deficient number, since it is larger than the sum of its proper divisors (310411).

1061645 is a wasteful number, since it uses less digits than its factorization.

1061645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16351.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1061645 is about 1030.3615870169. The cubic root of 1061645 is about 102.0139991038.

The spelling of 1061645 in words is "one million, sixty-one thousand, six hundred forty-five".