1641959 has 4 divisors (see below), whose sum is σ = 1791240. Its totient is φ = 1492680.

The previous prime is 1641953. The next prime is 1641971. The reversal of 1641959 is 9591461.

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

It is a cyclic number.

It is not a de Polignac number, because 1641959 - 2¹² = 1637863 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641953) 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, 74624 + ... + 74645.

It is an arithmetic number, because the mean of its divisors is an integer number (447810).

2^1641959 is an apocalyptic number.

1641959 is a deficient number, since it is larger than the sum of its proper divisors (149281).

1641959 is a wasteful number, since it uses less digits than its factorization.

1641959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149280.

The product of its digits is 9720, while the sum is 35.

The square root of 1641959 is about 1281.3894802128. The cubic root of 1641959 is about 117.9743073431.

The spelling of 1641959 in words is "one million, six hundred forty-one thousand, nine hundred fifty-nine".