1427421 has 4 divisors (see below), whose sum is σ = 1903232. Its totient is φ = 951612.

The previous prime is 1427411. The next prime is 1427431. The reversal of 1427421 is 1247241.

It is a happy number.

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.

It is an interprime number because it is at equal distance from previous prime (1427411) and next prime (1427431).

It is not a de Polignac number, because 1427421 - 2⁵ = 1427389 is a prime.

It is a super-2 number, since 2×1427421² = 4075061422482, which contains 22 as substring.

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 (1427401) 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, 237901 + ... + 237906.

It is an arithmetic number, because the mean of its divisors is an integer number (475808).

2^1427421 is an apocalyptic number.

It is an amenable number.

1427421 is a deficient number, since it is larger than the sum of its proper divisors (475811).

1427421 is an equidigital number, since it uses as much as digits as its factorization.

1427421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475810.

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

The square root of 1427421 is about 1194.7472536064. The cubic root of 1427421 is about 112.5945476781.

The spelling of 1427421 in words is "one million, four hundred twenty-seven thousand, four hundred twenty-one".