1420121 has 2 divisors, whose sum is σ = 1420122. Its totient is φ = 1420120.

The previous prime is 1420109. The next prime is 1420123. The reversal of 1420121 is 1210241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1413721 + 6400 = 1189^2 + 80^2 .

It is an emirp because it is prime and its reverse (1210241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1420121 - 2⁶ = 1420057 is a prime.

Together with 1420123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1420123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710060 + 710061.

It is an arithmetic number, because the mean of its divisors is an integer number (710061).

2^1420121 is an apocalyptic number.

It is an amenable number.

1420121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420121 is an equidigital number, since it uses as much as digits as its factorization.

1420121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1420121 is about 1191.6882981720. The cubic root of 1420121 is about 112.4022789270.

Adding to 1420121 its reverse (1210241), we get a palindrome (2630362).

The spelling of 1420121 in words is "one million, four hundred twenty thousand, one hundred twenty-one".