1420447 has 4 divisors (see below), whose sum is σ = 1623376. Its totient is φ = 1217520.

The previous prime is 1420429. The next prime is 1420483. The reversal of 1420447 is 7440241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7440241 = 47 ⋅158303.

It is a cyclic number.

It is not a de Polignac number, because 1420447 - 2¹¹ = 1418399 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 (1420847) 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, 101454 + ... + 101467.

It is an arithmetic number, because the mean of its divisors is an integer number (405844).

2^1420447 is an apocalyptic number.

1420447 is a deficient number, since it is larger than the sum of its proper divisors (202929).

1420447 is an equidigital number, since it uses as much as digits as its factorization.

1420447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202928.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 1420447 is about 1191.8250710570. The cubic root of 1420447 is about 112.4108792128.

Adding to 1420447 its reverse (7440241), we get a palindrome (8860688).

The spelling of 1420447 in words is "one million, four hundred twenty thousand, four hundred forty-seven".