1620227 has 4 divisors (see below), whose sum is σ = 1851696. Its totient is φ = 1388760.

The previous prime is 1620217. The next prime is 1620233. The reversal of 1620227 is 7220261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1620227 - 2¹⁴ = 1603843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1620199 and 1620208.

It is not an unprimeable number, because it can be changed into a prime (1620217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115724 + ... + 115737.

It is an arithmetic number, because the mean of its divisors is an integer number (462924).

2^1620227 is an apocalyptic number.

1620227 is a deficient number, since it is larger than the sum of its proper divisors (231469).

1620227 is an equidigital number, since it uses as much as digits as its factorization.

1620227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231468.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 1620227 is about 1272.8813770340. The cubic root of 1620227 is about 117.4515146267.

Adding to 1620227 its reverse (7220261), we get a palindrome (8840488).

The spelling of 1620227 in words is "one million, six hundred twenty thousand, two hundred twenty-seven".