1420621 has 2 divisors, whose sum is σ = 1420622. Its totient is φ = 1420620.

The previous prime is 1420613. The next prime is 1420631. The reversal of 1420621 is 1260241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 835396 + 585225 = 914^2 + 765^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420621 - 2³ = 1420613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1420595 and 1420604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1420631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710310 + 710311.

It is an arithmetic number, because the mean of its divisors is an integer number (710311).

2^1420621 is an apocalyptic number.

It is an amenable number.

1420621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420621 is an equidigital number, since it uses as much as digits as its factorization.

1420621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1420621 is about 1191.8980661114. The cubic root of 1420621 is about 112.4154690107.

Adding to 1420621 its reverse (1260241), we get a palindrome (2680862).

The spelling of 1420621 in words is "one million, four hundred twenty thousand, six hundred twenty-one".