1620266 has 8 divisors (see below), whose sum is σ = 2449920. Its totient is φ = 803628.

The previous prime is 1620257. The next prime is 1620271. The reversal of 1620266 is 6620261.

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

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, 2936 + ... + 3443.

It is an arithmetic number, because the mean of its divisors is an integer number (306240).

2^1620266 is an apocalyptic number.

1620266 is a deficient number, since it is larger than the sum of its proper divisors (829654).

1620266 is a wasteful number, since it uses less digits than its factorization.

1620266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6508.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1620266 is about 1272.8966965155. The cubic root of 1620266 is about 117.4524569993.

The spelling of 1620266 in words is "one million, six hundred twenty thousand, two hundred sixty-six".