1620441 has 12 divisors (see below), whose sum is σ = 2351700. Its totient is φ = 1075200.

The previous prime is 1620439. The next prime is 1620449. The reversal of 1620441 is 1440261.

1620441 is a `hidden beast` number, since 1 + 620 + 4 + 41 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1390041 + 230400 = 1179^2 + 480^2 .

It is not a de Polignac number, because 1620441 - 2¹ = 1620439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1620449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3385 + ... + 3833.

It is an arithmetic number, because the mean of its divisors is an integer number (195975).

2^1620441 is an apocalyptic number.

It is an amenable number.

1620441 is a deficient number, since it is larger than the sum of its proper divisors (731259).

1620441 is a wasteful number, since it uses less digits than its factorization.

1620441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856 (or 853 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1620441 is about 1272.9654355088. The cubic root of 1620441 is about 117.4566854079.

The spelling of 1620441 in words is "one million, six hundred twenty thousand, four hundred forty-one".