435681 has 6 divisors (see below), whose sum is σ = 629330. Its totient is φ = 290448.

The previous prime is 435679. The next prime is 435709. The reversal of 435681 is 186534.

It can be written as a sum of positive squares in only one way, i.e., 435600 + 81 = 660^2 + 9^2 .

It is not a de Polignac number, because 435681 - 2¹ = 435679 is a prime.

It is a super-2 number, since 2×435681² = 379635867522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (435641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24196 + ... + 24213.

2⁴³⁵⁶⁸¹ is an apocalyptic number.

It is an amenable number.

435681 is a deficient number, since it is larger than the sum of its proper divisors (193649).

435681 is a wasteful number, since it uses less digits than its factorization.

435681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48415 (or 48412 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 435681 is about 660.0613607840. The cubic root of 435681 is about 75.8093675694.

It can be divided in two parts, 4356 and 81, that multiplied together give a square (352836 = 594²).

The spelling of 435681 in words is "four hundred thirty-five thousand, six hundred eighty-one".