1981241 has 8 divisors (see below), whose sum is σ = 2073600. Its totient is φ = 1890720.

The previous prime is 1981237. The next prime is 1981247. The reversal of 1981241 is 1421891.

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

It is a cyclic number.

It is not a de Polignac number, because 1981241 - 2² = 1981237 is a prime.

It is a super-3 number, since 3×1981241³ = 23330990397577141563, which contains 333 as substring.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 1981241.

It is not an unprimeable number, because it can be changed into a prime (1981247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2045 + ... + 2853.

It is an arithmetic number, because the mean of its divisors is an integer number (259200).

2^1981241 is an apocalyptic number.

It is an amenable number.

1981241 is a deficient number, since it is larger than the sum of its proper divisors (92359).

1981241 is an equidigital number, since it uses as much as digits as its factorization.

1981241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919.

The product of its digits is 576, while the sum is 26.

The square root of 1981241 is about 1407.5656290205. The cubic root of 1981241 is about 125.5969526422.

It can be divided in two parts, 1981 and 241, that added together give a palindrome (2222).

The spelling of 1981241 in words is "one million, nine hundred eighty-one thousand, two hundred forty-one".