1641321341 has 4 divisors (see below), whose sum is σ = 1790532384. Its totient is φ = 1492110300.

The previous prime is 1641321337. The next prime is 1641321343. The reversal of 1641321341 is 1431231461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1641321341 - 2² = 1641321337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1641321341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641321343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74605505 + ... + 74605526.

It is an arithmetic number, because the mean of its divisors is an integer number (447633096).

Almost surely, 2^1641321341 is an apocalyptic number.

1641321341 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1641321341 is a deficient number, since it is larger than the sum of its proper divisors (149211043).

1641321341 is a wasteful number, since it uses less digits than its factorization.

1641321341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149211042.

The product of its digits is 1728, while the sum is 26.

The square root of 1641321341 is about 40513.2242730692. The cubic root of 1641321341 is about 1179.5903349053.

The spelling of 1641321341 in words is "one billion, six hundred forty-one million, three hundred twenty-one thousand, three hundred forty-one".