1620842 has 16 divisors (see below), whose sum is σ = 2547072. Its totient is φ = 772800.

The previous prime is 1620841. The next prime is 1620881. The reversal of 1620842 is 2480261.

It is not an unprimeable number, because it can be changed into a prime (1620841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3842 + ... + 4242.

It is an arithmetic number, because the mean of its divisors is an integer number (159192).

2^1620842 is an apocalyptic number.

1620842 is a deficient number, since it is larger than the sum of its proper divisors (926230).

1620842 is a wasteful number, since it uses less digits than its factorization.

1620842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1620842 is about 1273.1229320062. The cubic root of 1620842 is about 117.4663733562.

The spelling of 1620842 in words is "one million, six hundred twenty thousand, eight hundred forty-two".