11671421 has 2 divisors, whose sum is σ = 11671422. Its totient is φ = 11671420.

The previous prime is 11671417. The next prime is 11671493. The reversal of 11671421 is 12417611.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7365796 + 4305625 = 2714^2 + 2075^2 .

It is a cyclic number.

It is not a de Polignac number, because 11671421 - 2² = 11671417 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11671411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5835710 + 5835711.

It is an arithmetic number, because the mean of its divisors is an integer number (5835711).

Almost surely, 2^11671421 is an apocalyptic number.

It is an amenable number.

11671421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11671421 is an equidigital number, since it uses as much as digits as its factorization.

11671421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 23.

The square root of 11671421 is about 3416.3461475676. The cubic root of 11671421 is about 226.8338748449.

The spelling of 11671421 in words is "eleven million, six hundred seventy-one thousand, four hundred twenty-one".