1644061 has 2 divisors, whose sum is σ = 1644062. Its totient is φ = 1644060.

The previous prime is 1644031. The next prime is 1644067. The reversal of 1644061 is 1604461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1012036 + 632025 = 1006^2 + 795^2 .

It is an emirp because it is prime and its reverse (1604461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1644061 - 2¹⁵ = 1611293 is a prime.

It is a super-3 number, since 3×1644061³ = 13331377809120596943, which contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1644067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822030 + 822031.

It is an arithmetic number, because the mean of its divisors is an integer number (822031).

2^1644061 is an apocalyptic number.

It is an amenable number.

1644061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1644061 is an equidigital number, since it uses as much as digits as its factorization.

1644061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1644061 is about 1282.2094212725. The cubic root of 1644061 is about 118.0246285852.

It can be divided in two parts, 164 and 4061, that added together give a square (4225 = 65²).

The spelling of 1644061 in words is "one million, six hundred forty-four thousand, sixty-one".