11642921 has 2 divisors, whose sum is σ = 11642922. Its totient is φ = 11642920.

The previous prime is 11642879. The next prime is 11642923. The reversal of 11642921 is 12924611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8179600 + 3463321 = 2860^2 + 1861^2 .

It is a cyclic number.

It is not a de Polignac number, because 11642921 - 2¹⁰ = 11641897 is a prime.

Together with 11642923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11642923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5821460 + 5821461.

It is an arithmetic number, because the mean of its divisors is an integer number (5821461).

Almost surely, 2^11642921 is an apocalyptic number.

It is an amenable number.

11642921 is a deficient number, since it is larger than the sum of its proper divisors (1).

11642921 is an equidigital number, since it uses as much as digits as its factorization.

11642921 is an evil number, because the sum of its binary digits is even.

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

The square root of 11642921 is about 3412.1724751249. The cubic root of 11642921 is about 226.6490920149.

The spelling of 11642921 in words is "eleven million, six hundred forty-two thousand, nine hundred twenty-one".