10403981 has 8 divisors (see below), whose sum is σ = 12407424. Its totient is φ = 8529840.

The previous prime is 10403959. The next prime is 10403989. The reversal of 10403981 is 18930401.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10403981 is a prime.

It is a super-2 number, since 2×10403981² = 216485641296722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10403981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10403989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32150 + ... + 32471.

It is an arithmetic number, because the mean of its divisors is an integer number (1550928).

Almost surely, 2^10403981 is an apocalyptic number.

It is an amenable number.

10403981 is a deficient number, since it is larger than the sum of its proper divisors (2003443).

10403981 is an equidigital number, since it uses as much as digits as its factorization.

10403981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64651.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 10403981 is about 3225.5202681118. The cubic root of 10403981 is about 218.3064245661.

The spelling of 10403981 in words is "ten million, four hundred three thousand, nine hundred eighty-one".