411981 has 8 divisors (see below), whose sum is σ = 555840. Its totient is φ = 271392.

The previous prime is 411967. The next prime is 411991. The reversal of 411981 is 189114.

411981 = 19² + 20² + ... + 107².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 411981 - 2⁹ = 411469 is a prime.

It is a super-2 number, since 2×411981² = 339456688722, which contains 22 as substring.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (411941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505 + ... + 1038.

It is an arithmetic number, because the mean of its divisors is an integer number (69480).

2⁴¹¹⁹⁸¹ is an apocalyptic number.

It is an amenable number.

411981 is a deficient number, since it is larger than the sum of its proper divisors (143859).

411981 is a wasteful number, since it uses less digits than its factorization.

411981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635.

The product of its digits is 288, while the sum is 24.

The square root of 411981 is about 641.8574608120. The cubic root of 411981 is about 74.4090447438.

The spelling of 411981 in words is "four hundred eleven thousand, nine hundred eighty-one".