1421229 has 4 divisors (see below), whose sum is σ = 1894976. Its totient is φ = 947484.

The previous prime is 1421227. The next prime is 1421243. The reversal of 1421229 is 9221241.

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: 9221241 = 3 ⋅3073747.

It is not a de Polignac number, because 1421229 - 2¹ = 1421227 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421221) 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, 236869 + ... + 236874.

It is an arithmetic number, because the mean of its divisors is an integer number (473744).

2^1421229 is an apocalyptic number.

It is an amenable number.

1421229 is a deficient number, since it is larger than the sum of its proper divisors (473747).

1421229 is an equidigital number, since it uses as much as digits as its factorization.

1421229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473746.

The product of its digits is 288, while the sum is 21.

The square root of 1421229 is about 1192.1530941955. The cubic root of 1421229 is about 112.4315039834.

It can be divided in two parts, 14212 and 29, that added together give a palindrome (14241).

The spelling of 1421229 in words is "one million, four hundred twenty-one thousand, two hundred twenty-nine".