10965981 has 16 divisors (see below), whose sum is σ = 15813504. Its totient is φ = 6719424.

The previous prime is 10965959. The next prime is 10965991. The reversal of 10965981 is 18956901.

It is not a de Polignac number, because 10965981 - 2⁷ = 10965853 is a prime.

It is a super-2 number, since 2×10965981² = 240505478584722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10965991) 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, 11920 + ... + 12806.

It is an arithmetic number, because the mean of its divisors is an integer number (988344).

Almost surely, 2^10965981 is an apocalyptic number.

It is an amenable number.

10965981 is a deficient number, since it is larger than the sum of its proper divisors (4847523).

10965981 is a wasteful number, since it uses less digits than its factorization.

10965981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220.

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 10965981 is about 3311.4922618058. The cubic root of 10965981 is about 222.1685069152.

The spelling of 10965981 in words is "ten million, nine hundred sixty-five thousand, nine hundred eighty-one".