1620354 has 8 divisors (see below), whose sum is σ = 3240720. Its totient is φ = 540116.

The previous prime is 1620347. The next prime is 1620371. The reversal of 1620354 is 4530261.

It is a happy number.

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

1620354 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1620354.

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, 135024 + ... + 135035.

It is an arithmetic number, because the mean of its divisors is an integer number (405090).

2^1620354 is an apocalyptic number.

1620354 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1620354 is a wasteful number, since it uses less digits than its factorization.

1620354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270064.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1620354 is about 1272.9312628732. The cubic root of 1620354 is about 117.4545833228.

The spelling of 1620354 in words is "one million, six hundred twenty thousand, three hundred fifty-four".