1421711 has 2 divisors, whose sum is σ = 1421712. Its totient is φ = 1421710.

The previous prime is 1421689. The next prime is 1421731. The reversal of 1421711 is 1171241.

It is a strong prime.

It is an emirp because it is prime and its reverse (1171241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1421711 - 2⁶ = 1421647 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1421711.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710855 + 710856.

It is an arithmetic number, because the mean of its divisors is an integer number (710856).

2^1421711 is an apocalyptic number.

1421711 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421711 is an equidigital number, since it uses as much as digits as its factorization.

1421711 is an evil number, because the sum of its binary digits is even.

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

The square root of 1421711 is about 1192.3552323029. The cubic root of 1421711 is about 112.4442126696. Note that the first 3 decimals are identical.

Adding to 1421711 its reverse (1171241), we get a palindrome (2592952).

It can be divided in two parts, 1421 and 711, that multiplied together give a triangular number (1010331 = T₁₄₂₁).

The spelling of 1421711 in words is "one million, four hundred twenty-one thousand, seven hundred eleven".