1641007 has 2 divisors, whose sum is σ = 1641008. Its totient is φ = 1641006.

The previous prime is 1640971. The next prime is 1641043. The reversal of 1641007 is 7001461.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1640971) and next prime (1641043).

It is a cyclic number.

It is not a de Polignac number, because 1641007 - 2⁷ = 1640879 is a prime.

1641007 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1641077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820503 + 820504.

It is an arithmetic number, because the mean of its divisors is an integer number (820504).

2^1641007 is an apocalyptic number.

1641007 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641007 is an equidigital number, since it uses as much as digits as its factorization.

1641007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 1641007 is about 1281.0179545970. The cubic root of 1641007 is about 117.9515026216.

Adding to 1641007 its reverse (7001461), we get a palindrome (8642468).

The spelling of 1641007 in words is "one million, six hundred forty-one thousand, seven".