1421489 has 4 divisors (see below), whose sum is σ = 1505124. Its totient is φ = 1337856.

The previous prime is 1421479. The next prime is 1421501. The reversal of 1421489 is 9841241.

1421489 = T₂₇₂ + T₂₇₃ + ... + T₃₀₅.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9841241 = 179 ⋅54979.

It can be written as a sum of positive squares in 2 ways, for example, as 1081600 + 339889 = 1040^2 + 583^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421489 - 2⁴ = 1421473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41792 + ... + 41825.

It is an arithmetic number, because the mean of its divisors is an integer number (376281).

2^1421489 is an apocalyptic number.

It is an amenable number.

1421489 is a deficient number, since it is larger than the sum of its proper divisors (83635).

1421489 is an equidigital number, since it uses as much as digits as its factorization.

1421489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83634.

The product of its digits is 2304, while the sum is 29.

The square root of 1421489 is about 1192.2621356061. The cubic root of 1421489 is about 112.4383596482.

The spelling of 1421489 in words is "one million, four hundred twenty-one thousand, four hundred eighty-nine".