1701211681 has 4 divisors (see below), whose sum is σ = 1832074132. Its totient is φ = 1570349232.

The previous prime is 1701211667. The next prime is 1701211697. The reversal of 1701211681 is 1861121071.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1861121071 = 1297 ⋅1434943.

It can be written as a sum of positive squares in 2 ways, for example, as 78411025 + 1622800656 = 8855^2 + 40284^2 .

It is a cyclic number.

It is not a de Polignac number, because 1701211681 - 2⁷ = 1701211553 is a prime.

It is a super-2 number, since 2×1701211681² = 5788242367141691522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1701211661) 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, 65431206 + ... + 65431231.

It is an arithmetic number, because the mean of its divisors is an integer number (458018533).

Almost surely, 2^1701211681 is an apocalyptic number.

It is an amenable number.

1701211681 is a deficient number, since it is larger than the sum of its proper divisors (130862451).

1701211681 is a wasteful number, since it uses less digits than its factorization.

1701211681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130862450.

The product of its (nonzero) digits is 672, while the sum is 28.

The square root of 1701211681 is about 41245.7474292805. The cubic root of 1701211681 is about 1193.7666777053.

The spelling of 1701211681 in words is "one billion, seven hundred one million, two hundred eleven thousand, six hundred eighty-one".