1641011 has 4 divisors (see below), whose sum is σ = 1727400. Its totient is φ = 1554624.

The previous prime is 1641007. The next prime is 1641043. The reversal of 1641011 is 1101461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1101461 = 31 ⋅35531.

It is a cyclic number.

It is not a de Polignac number, because 1641011 - 2² = 1641007 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 43166 + ... + 43203.

It is an arithmetic number, because the mean of its divisors is an integer number (431850).

2^1641011 is an apocalyptic number.

1641011 is a deficient number, since it is larger than the sum of its proper divisors (86389).

1641011 is an equidigital number, since it uses as much as digits as its factorization.

1641011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86388.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1641011 is about 1281.0195158545. The cubic root of 1641011 is about 117.9515984582.

Adding to 1641011 its reverse (1101461), we get a palindrome (2742472).

The spelling of 1641011 in words is "one million, six hundred forty-one thousand, eleven".