1421205 has 8 divisors (see below), whose sum is σ = 2273952. Its totient is φ = 757968.

The previous prime is 1421191. The next prime is 1421213. The reversal of 1421205 is 5021241.

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

It is not a de Polignac number, because 1421205 - 2⁶ = 1421141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 94747 = 1421205 / (1 + 4 + 2 + 1 + 2 + 0 + 5).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 47359 + ... + 47388.

It is an arithmetic number, because the mean of its divisors is an integer number (284244).

2^1421205 is an apocalyptic number.

1421205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1421205 is a deficient number, since it is larger than the sum of its proper divisors (852747).

1421205 is an equidigital number, since it uses as much as digits as its factorization.

1421205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94755.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1421205 is about 1192.1430283318. The cubic root of 1421205 is about 112.4308711107.

Adding to 1421205 its reverse (5021241), we get a palindrome (6442446).

The spelling of 1421205 in words is "one million, four hundred twenty-one thousand, two hundred five".