1641252085 has 16 divisors (see below), whose sum is σ = 2149612992. Its totient is φ = 1193046400.

The previous prime is 1641252083. The next prime is 1641252089. The reversal of 1641252085 is 5802521461.

It is a happy number.

It is not a de Polignac number, because 1641252085 - 2¹ = 1641252083 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 1641252085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641252083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126417 + ... + 138793.

It is an arithmetic number, because the mean of its divisors is an integer number (134350812).

Almost surely, 2^1641252085 is an apocalyptic number.

It is an amenable number.

1641252085 is a deficient number, since it is larger than the sum of its proper divisors (508360907).

1641252085 is a wasteful number, since it uses less digits than its factorization.

1641252085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14804.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 1641252085 is about 40512.3695307989. The cubic root of 1641252085 is about 1179.5737436271.

The spelling of 1641252085 in words is "one billion, six hundred forty-one million, two hundred fifty-two thousand, eighty-five".