1421287 has 8 divisors (see below), whose sum is σ = 1632416. Its totient is φ = 1212192.

The previous prime is 1421267. The next prime is 1421291. The reversal of 1421287 is 7821241.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1421287 - 2⁷ = 1421159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1573 + ... + 2305.

It is an arithmetic number, because the mean of its divisors is an integer number (204052).

2^1421287 is an apocalyptic number.

1421287 is a deficient number, since it is larger than the sum of its proper divisors (211129).

1421287 is an equidigital number, since it uses as much as digits as its factorization.

1421287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017.

The product of its digits is 896, while the sum is 25.

The square root of 1421287 is about 1192.1774196822. The cubic root of 1421287 is about 112.4330333965.

The spelling of 1421287 in words is "one million, four hundred twenty-one thousand, two hundred eighty-seven".