11711421 has 12 divisors (see below), whose sum is σ = 17107740. Its totient is φ = 7719360.

The previous prime is 11711411. The next prime is 11711431. The reversal of 11711421 is 12411711.

It is an interprime number because it is at equal distance from previous prime (11711411) and next prime (11711431).

It can be written as a sum of positive squares in 2 ways, for example, as 622521 + 11088900 = 789^2 + 3330^2 .

It is not a de Polignac number, because 11711421 - 2¹⁰ = 11710397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11711394 and 11711403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11711411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6510 + ... + 8111.

It is an arithmetic number, because the mean of its divisors is an integer number (1425645).

Almost surely, 2^11711421 is an apocalyptic number.

It is an amenable number.

11711421 is a deficient number, since it is larger than the sum of its proper divisors (5396319).

11711421 is a wasteful number, since it uses less digits than its factorization.

11711421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14716 (or 14713 counting only the distinct ones).

The product of its digits is 56, while the sum is 18.

The square root of 11711421 is about 3422.1953480186. The cubic root of 11711421 is about 227.0927124894.

The spelling of 11711421 in words is "eleven million, seven hundred eleven thousand, four hundred twenty-one".