1421273 has 4 divisors (see below), whose sum is σ = 1624320. Its totient is φ = 1218228.

The previous prime is 1421267. The next prime is 1421291. The reversal of 1421273 is 3721241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3721241 = 547 ⋅6803.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421213) 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, 101513 + ... + 101526.

It is an arithmetic number, because the mean of its divisors is an integer number (406080).

2^1421273 is an apocalyptic number.

It is an amenable number.

1421273 is a deficient number, since it is larger than the sum of its proper divisors (203047).

1421273 is an equidigital number, since it uses as much as digits as its factorization.

1421273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203046.

The product of its digits is 336, while the sum is 20.

The square root of 1421273 is about 1192.1715480584. The cubic root of 1421273 is about 112.4326642316.

Subtracting 1421273 from its reverse (3721241), we obtain a cube (2299968 = 132³).

The spelling of 1421273 in words is "one million, four hundred twenty-one thousand, two hundred seventy-three".