1641061 has 8 divisors (see below), whose sum is σ = 1785240. Its totient is φ = 1502208.

The previous prime is 1641053. The next prime is 1641077. The reversal of 1641061 is 1601461.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 776161 + 864900 = 881^2 + 930^2 .

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 1641061 - 2³ = 1641053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641091) 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, 676 + ... + 1933.

It is an arithmetic number, because the mean of its divisors is an integer number (223155).

2^1641061 is an apocalyptic number.

It is an amenable number.

1641061 is a deficient number, since it is larger than the sum of its proper divisors (144179).

1641061 is a wasteful number, since it uses less digits than its factorization.

1641061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1641061 is about 1281.0390314116. The cubic root of 1641061 is about 117.9527964026.

It can be divided in two parts, 16410 and 61, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 1641061 in words is "one million, six hundred forty-one thousand, sixty-one".