1620272 has 10 divisors (see below), whose sum is σ = 3139308. Its totient is φ = 810128.

The previous prime is 1620271. The next prime is 1620319. The reversal of 1620272 is 2720261.

It is not an unprimeable number, because it can be changed into a prime (1620271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50618 + ... + 50649.

2^1620272 is an apocalyptic number.

It is an amenable number.

1620272 is a deficient number, since it is larger than the sum of its proper divisors (1519036).

1620272 is a wasteful number, since it uses less digits than its factorization.

1620272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101275 (or 101269 counting only the distinct ones).

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

The square root of 1620272 is about 1272.8990533424. The cubic root of 1620272 is about 117.4526019783.

The spelling of 1620272 in words is "one million, six hundred twenty thousand, two hundred seventy-two".