1421427 has 16 divisors (see below), whose sum is σ = 2188800. Its totient is φ = 803712.

The previous prime is 1421417. The next prime is 1421437. The reversal of 1421427 is 7241241.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1421417) and next prime (1421437).

It is not a de Polignac number, because 1421427 - 2¹⁰ = 1420403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1421417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2074 + ... + 2672.

It is an arithmetic number, because the mean of its divisors is an integer number (136800).

2^1421427 is an apocalyptic number.

1421427 is a deficient number, since it is larger than the sum of its proper divisors (767373).

1421427 is a wasteful number, since it uses less digits than its factorization.

1421427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722.

The product of its digits is 448, while the sum is 21.

The square root of 1421427 is about 1192.2361343291. The cubic root of 1421427 is about 112.4367249117.

Adding to 1421427 its reverse (7241241), we get a palindrome (8662668).

It can be divided in two parts, 14214 and 27, that added together give a palindrome (14241).

The spelling of 1421427 in words is "one million, four hundred twenty-one thousand, four hundred twenty-seven".