435981 has 16 divisors (see below), whose sum is σ = 715904. Its totient is φ = 229824.

The previous prime is 435973. The next prime is 435983. The reversal of 435981 is 189534.

It is not a de Polignac number, because 435981 - 2³ = 435973 is a prime.

It is a super-2 number, since 2×435981² = 380158864722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (435983) 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, 526 + ... + 1071.

It is an arithmetic number, because the mean of its divisors is an integer number (44744).

2⁴³⁵⁹⁸¹ is an apocalyptic number.

It is an amenable number.

435981 is a deficient number, since it is larger than the sum of its proper divisors (279923).

435981 is a wasteful number, since it uses less digits than its factorization.

435981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620.

The product of its digits is 4320, while the sum is 30.

The square root of 435981 is about 660.2885732769. The cubic root of 435981 is about 75.8267637777.

The spelling of 435981 in words is "four hundred thirty-five thousand, nine hundred eighty-one".