11739221 has 4 divisors (see below), whose sum is σ = 12642252. Its totient is φ = 10836192.

The previous prime is 11739199. The next prime is 11739241. The reversal of 11739221 is 12293711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6832996 + 4906225 = 2614^2 + 2215^2 .

It is a cyclic number.

It is not a de Polignac number, because 11739221 - 2⁶ = 11739157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11739241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451496 + ... + 451521.

It is an arithmetic number, because the mean of its divisors is an integer number (3160563).

Almost surely, 2^11739221 is an apocalyptic number.

It is an amenable number.

11739221 is a deficient number, since it is larger than the sum of its proper divisors (903031).

11739221 is an equidigital number, since it uses as much as digits as its factorization.

11739221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903030.

The product of its digits is 756, while the sum is 26.

The square root of 11739221 is about 3426.2546607046. The cubic root of 11739221 is about 227.2722577008.

The spelling of 11739221 in words is "eleven million, seven hundred thirty-nine thousand, two hundred twenty-one".