1408621 has 2 divisors, whose sum is σ = 1408622. Its totient is φ = 1408620.

The previous prime is 1408619. The next prime is 1408633. The reversal of 1408621 is 1268041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1406596 + 2025 = 1186^2 + 45^2 .

It is a cyclic number.

It is not a de Polignac number, because 1408621 - 2¹ = 1408619 is a prime.

Together with 1408619, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1408592 and 1408601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1408601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 704310 + 704311.

It is an arithmetic number, because the mean of its divisors is an integer number (704311).

2^1408621 is an apocalyptic number.

It is an amenable number.

1408621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1408621 is an equidigital number, since it uses as much as digits as its factorization.

1408621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1408621 is about 1186.8534029104. The cubic root of 1408621 is about 112.0980487060.

The spelling of 1408621 in words is "one million, four hundred eight thousand, six hundred twenty-one".