1171421 has 2 divisors, whose sum is σ = 1171422. Its totient is φ = 1171420.

The previous prime is 1171399. The next prime is 1171427. The reversal of 1171421 is 1241711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1020100 + 151321 = 1010^2 + 389^2 .

It is a cyclic number.

It is not a de Polignac number, because 1171421 - 2¹⁰ = 1170397 is a prime.

It is a super-3 number, since 3×1171421³ = 4822367133315754383, which contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1171421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1171427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585710 + 585711.

It is an arithmetic number, because the mean of its divisors is an integer number (585711).

2^1171421 is an apocalyptic number.

It is an amenable number.

1171421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171421 is an equidigital number, since it uses as much as digits as its factorization.

1171421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56, while the sum is 17.

The square root of 1171421 is about 1082.3220407993. The cubic root of 1171421 is about 105.4154665266.

It can be divided in two parts, 11 and 71421, that multiplied together give a triangular number (785631 = T₁₂₅₃).

The spelling of 1171421 in words is "one million, one hundred seventy-one thousand, four hundred twenty-one".