1420243 has 4 divisors (see below), whose sum is σ = 1549368. Its totient is φ = 1291120.

The previous prime is 1420207. The next prime is 1420253. The reversal of 1420243 is 3420241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3420241 = 11 ⋅310931.

It is a cyclic number.

It is not a de Polignac number, because 1420243 - 2¹³ = 1412051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64546 + ... + 64567.

It is an arithmetic number, because the mean of its divisors is an integer number (387342).

2^1420243 is an apocalyptic number.

1420243 is a deficient number, since it is larger than the sum of its proper divisors (129125).

1420243 is a wasteful number, since it uses less digits than its factorization.

1420243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129124.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1420243 is about 1191.7394849547. The cubic root of 1420243 is about 112.4054975929.

Adding to 1420243 its reverse (3420241), we get a palindrome (4840484).

The spelling of 1420243 in words is "one million, four hundred twenty thousand, two hundred forty-three".