1421289 has 12 divisors (see below), whose sum is σ = 2080000. Its totient is φ = 935064.

The previous prime is 1421267. The next prime is 1421291. The reversal of 1421289 is 9821241.

It is not a de Polignac number, because 1421289 - 2⁹ = 1420777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1421249) 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, 289 + ... + 1710.

2^1421289 is an apocalyptic number.

It is an amenable number.

1421289 is a deficient number, since it is larger than the sum of its proper divisors (658711).

1421289 is a wasteful number, since it uses less digits than its factorization.

1421289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084 (or 2081 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 1421289 is about 1192.1782584832. The cubic root of 1421289 is about 112.4330861341.

It can be divided in two parts, 142 and 1289, that added together give a triangular number (1431 = T₅₃).

The spelling of 1421289 in words is "one million, four hundred twenty-one thousand, two hundred eighty-nine".