1620226 has 8 divisors (see below), whose sum is σ = 2447100. Its totient is φ = 804528.

The previous prime is 1620217. The next prime is 1620233. The reversal of 1620226 is 6220261.

It can be written as a sum of positive squares in 2 ways, for example, as 1565001 + 55225 = 1251^2 + 235^2 .

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

It is an Ulam 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, 2421 + ... + 3016.

2^1620226 is an apocalyptic number.

1620226 is a deficient number, since it is larger than the sum of its proper divisors (826874).

1620226 is a wasteful number, since it uses less digits than its factorization.

1620226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5588.

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

The square root of 1620226 is about 1272.8809842244. The cubic root of 1620226 is about 117.4514904631.

Adding to 1620226 its reverse (6220261), we get a palindrome (7840487).

The spelling of 1620226 in words is "one million, six hundred twenty thousand, two hundred twenty-six".