1421759 has 2 divisors, whose sum is σ = 1421760. Its totient is φ = 1421758.

The previous prime is 1421747. The next prime is 1421773. The reversal of 1421759 is 9571241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1421759 - 2²⁰ = 373183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710879 + 710880.

It is an arithmetic number, because the mean of its divisors is an integer number (710880).

2^1421759 is an apocalyptic number.

1421759 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421759 is an equidigital number, since it uses as much as digits as its factorization.

1421759 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 29.

The square root of 1421759 is about 1192.3753603627. The cubic root of 1421759 is about 112.4454781076.

The spelling of 1421759 in words is "one million, four hundred twenty-one thousand, seven hundred fifty-nine".