1435681 has 4 divisors (see below), whose sum is σ = 1546132. Its totient is φ = 1325232.

The previous prime is 1435669. The next prime is 1435739. The reversal of 1435681 is 1865341.

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

It can be written as a sum of positive squares in 2 ways, for example, as 625681 + 810000 = 791^2 + 900^2 .

It is a cyclic number.

It is not a de Polignac number, because 1435681 - 2¹¹ = 1433633 is a prime.

It is a super-2 number, since 2×1435681² = 4122359867522, which contains 22 as substring.

It is a Duffinian number.

1435681 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1435631) 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, 55206 + ... + 55231.

It is an arithmetic number, because the mean of its divisors is an integer number (386533).

2^1435681 is an apocalyptic number.

It is an amenable number.

1435681 is a deficient number, since it is larger than the sum of its proper divisors (110451).

1435681 is a wasteful number, since it uses less digits than its factorization.

1435681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110450.

The product of its digits is 2880, while the sum is 28.

The square root of 1435681 is about 1198.1990652642. The cubic root of 1435681 is about 112.8113122216.

It can be divided in two parts, 1435 and 681, that added together give a square (2116 = 46²).

The spelling of 1435681 in words is "one million, four hundred thirty-five thousand, six hundred eighty-one".