1620047 has 8 divisors (see below), whose sum is σ = 1903440. Its totient is φ = 1359360.

The previous prime is 1620041. The next prime is 1620071. The reversal of 1620047 is 7400261.

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

It is a cyclic number.

It is not a de Polignac number, because 1620047 - 2⁶ = 1619983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5522 + ... + 5807.

It is an arithmetic number, because the mean of its divisors is an integer number (237930).

2^1620047 is an apocalyptic number.

1620047 is a deficient number, since it is larger than the sum of its proper divisors (283393).

1620047 is a wasteful number, since it uses less digits than its factorization.

1620047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11353.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 1620047 is about 1272.8106693456. The cubic root of 1620047 is about 117.4471650190.

The spelling of 1620047 in words is "one million, six hundred twenty thousand, forty-seven".