1620604 has 12 divisors (see below), whose sum is σ = 2846200. Its totient is φ = 807408.

The previous prime is 1620589. The next prime is 1620611. The reversal of 1620604 is 4060261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 982 + ... + 2050.

2^1620604 is an apocalyptic number.

It is an amenable number.

1620604 is a deficient number, since it is larger than the sum of its proper divisors (1225596).

1620604 is a wasteful number, since it uses less digits than its factorization.

1620604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452 (or 1450 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1620604 is about 1273.0294576325. The cubic root of 1620604 is about 117.4606235946.

Adding to 1620604 its reverse (4060261), we get a palindrome (5680865).

The spelling of 1620604 in words is "one million, six hundred twenty thousand, six hundred four".