1421279 has 4 divisors (see below), whose sum is σ = 1454376. Its totient is φ = 1388184.

The previous prime is 1421267. The next prime is 1421291. The reversal of 1421279 is 9721241.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1421267) and next prime (1421291).

It is a cyclic number.

It is not a de Polignac number, because 1421279 - 2¹² = 1417183 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 16484 + ... + 16569.

It is an arithmetic number, because the mean of its divisors is an integer number (363594).

2^1421279 is an apocalyptic number.

1421279 is a deficient number, since it is larger than the sum of its proper divisors (33097).

1421279 is an equidigital number, since it uses as much as digits as its factorization.

1421279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33096.

The product of its digits is 1008, while the sum is 26.

The square root of 1421279 is about 1192.1740644721. The cubic root of 1421279 is about 112.4328224454.

The spelling of 1421279 in words is "one million, four hundred twenty-one thousand, two hundred seventy-nine".