11929121 has 8 divisors (see below), whose sum is σ = 13066920. Its totient is φ = 10839808.

The previous prime is 11929091. The next prime is 11929123. The reversal of 11929121 is 12192911.

It can be written as a sum of positive squares in 4 ways, for example, as 1918225 + 10010896 = 1385^2 + 3164^2 .

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 11929121 - 2²² = 7734817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11929123) 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, 11606 + ... + 12591.

It is an arithmetic number, because the mean of its divisors is an integer number (1633365).

Almost surely, 2^11929121 is an apocalyptic number.

It is an amenable number.

11929121 is a deficient number, since it is larger than the sum of its proper divisors (1137799).

11929121 is a wasteful number, since it uses less digits than its factorization.

11929121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24243.

The product of its digits is 324, while the sum is 26.

The square root of 11929121 is about 3453.8559610962. The cubic root of 11929121 is about 228.4912014386.

The spelling of 11929121 in words is "eleven million, nine hundred twenty-nine thousand, one hundred twenty-one".