1620041 has 2 divisors, whose sum is σ = 1620042. Its totient is φ = 1620040.

The previous prime is 1620019. The next prime is 1620071. The reversal of 1620041 is 1400261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1042441 + 577600 = 1021^2 + 760^2 .

It is an emirp because it is prime and its reverse (1400261) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1620041 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1619998 and 1620025.

It is not a weakly prime, because it can be changed into another prime (1620001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810020 + 810021.

It is an arithmetic number, because the mean of its divisors is an integer number (810021).

2^1620041 is an apocalyptic number.

It is an amenable number.

1620041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620041 is an equidigital number, since it uses as much as digits as its factorization.

1620041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1620041 is about 1272.8083123550. The cubic root of 1620041 is about 117.4470200265.

The spelling of 1620041 in words is "one million, six hundred twenty thousand, forty-one".