1620479 has 6 divisors (see below), whose sum is σ = 1885104. Its totient is φ = 1388940.

The previous prime is 1620469. The next prime is 1620497. The reversal of 1620479 is 9740261.

It is not a de Polignac number, because 1620479 - 2²⁰ = 571903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620439) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16487 + ... + 16584.

It is an arithmetic number, because the mean of its divisors is an integer number (314184).

2^1620479 is an apocalyptic number.

1620479 is a deficient number, since it is larger than the sum of its proper divisors (264625).

1620479 is an equidigital number, since it uses as much as digits as its factorization.

1620479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33085 (or 33078 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1620479 is about 1272.9803611997. The cubic root of 1620479 is about 117.4576035364.

The spelling of 1620479 in words is "one million, six hundred twenty thousand, four hundred seventy-nine".