1620359 has 4 divisors (see below), whose sum is σ = 1745016. Its totient is φ = 1495704.

The previous prime is 1620347. The next prime is 1620371. The reversal of 1620359 is 9530261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9530261 = 13 ⋅733097.

It is an interprime number because it is at equal distance from previous prime (1620347) and next prime (1620371).

It is a cyclic number.

It is not a de Polignac number, because 1620359 - 2⁸ = 1620103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620319) 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 3 ways as a sum of consecutive naturals, for example, 62309 + ... + 62334.

It is an arithmetic number, because the mean of its divisors is an integer number (436254).

2^1620359 is an apocalyptic number.

1620359 is a deficient number, since it is larger than the sum of its proper divisors (124657).

1620359 is a wasteful number, since it uses less digits than its factorization.

1620359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124656.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 1620359 is about 1272.9332268426. The cubic root of 1620359 is about 117.4547041343.

The spelling of 1620359 in words is "one million, six hundred twenty thousand, three hundred fifty-nine".