1620411 has 8 divisors (see below), whose sum is σ = 2326800. Its totient is φ = 997152.

The previous prime is 1620403. The next prime is 1620413. The reversal of 1620411 is 1140261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1620411 - 2³ = 1620403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1620413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20736 + ... + 20813.

It is an arithmetic number, because the mean of its divisors is an integer number (290850).

2^1620411 is an apocalyptic number.

1620411 is a deficient number, since it is larger than the sum of its proper divisors (706389).

1620411 is a wasteful number, since it uses less digits than its factorization.

1620411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41565.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1620411 is about 1272.9536519450. The cubic root of 1620411 is about 117.4559605594.

Adding to 1620411 its reverse (1140261), we get a palindrome (2760672).

The spelling of 1620411 in words is "one million, six hundred twenty thousand, four hundred eleven".