1641151 has 4 divisors (see below), whose sum is σ = 1643832. Its totient is φ = 1638472.

The previous prime is 1641137. The next prime is 1641161. The reversal of 1641151 is 1511461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1641151 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 (1641131) 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, 81 + ... + 1813.

It is an arithmetic number, because the mean of its divisors is an integer number (410958).

2^1641151 is an apocalyptic number.

1641151 is a deficient number, since it is larger than the sum of its proper divisors (2681).

1641151 is an equidigital number, since it uses as much as digits as its factorization.

1641151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2680.

The product of its digits is 120, while the sum is 19.

The square root of 1641151 is about 1281.0741586653. The cubic root of 1641151 is about 117.9549526413.

The spelling of 1641151 in words is "one million, six hundred forty-one thousand, one hundred fifty-one".