1641263 has 8 divisors (see below), whose sum is σ = 1779456. Its totient is φ = 1504800.

The previous prime is 1641253. The next prime is 1641281. The reversal of 1641263 is 3621461.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1641263 - 2⁸ = 1641007 is a prime.

It is a d-powerful number, because it can be written as 1 + 6³ + 4³ + 1 + 2 + 6⁶ + 3¹³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2153 + ... + 2813.

It is an arithmetic number, because the mean of its divisors is an integer number (222432).

2^1641263 is an apocalyptic number.

1641263 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1641263 is a deficient number, since it is larger than the sum of its proper divisors (138193).

1641263 is a wasteful number, since it uses less digits than its factorization.

1641263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865.

The product of its digits is 864, while the sum is 23.

The square root of 1641263 is about 1281.1178712359. The cubic root of 1641263 is about 117.9576358504.

The spelling of 1641263 in words is "one million, six hundred forty-one thousand, two hundred sixty-three".