1421401 has 2 divisors, whose sum is σ = 1421402. Its totient is φ = 1421400.

The previous prime is 1421389. The next prime is 1421417. The reversal of 1421401 is 1041241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1299600 + 121801 = 1140^2 + 349^2 .

It is an emirp because it is prime and its reverse (1041241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1421401 - 2¹⁵ = 1388633 is a prime.

It is not a weakly prime, because it can be changed into another prime (1421461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710700 + 710701.

It is an arithmetic number, because the mean of its divisors is an integer number (710701).

2^1421401 is an apocalyptic number.

It is an amenable number.

1421401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421401 is an equidigital number, since it uses as much as digits as its factorization.

1421401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1421401 is about 1192.2252303990. The cubic root of 1421401 is about 112.4360393629.

Adding to 1421401 its reverse (1041241), we get a palindrome (2462642).

The spelling of 1421401 in words is "one million, four hundred twenty-one thousand, four hundred one".