1620167 has 4 divisors (see below), whose sum is σ = 1625040. Its totient is φ = 1615296.

The previous prime is 1620161. The next prime is 1620209. The reversal of 1620167 is 7610261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7610261 = 157 ⋅48473.

It is a cyclic number.

It is not a de Polignac number, because 1620167 - 2⁶ = 1620103 is a prime.

It is a super-2 number, since 2×1620167² = 5249882215778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620161) 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, 1898 + ... + 2615.

It is an arithmetic number, because the mean of its divisors is an integer number (406260).

2^1620167 is an apocalyptic number.

1620167 is a deficient number, since it is larger than the sum of its proper divisors (4873).

1620167 is an equidigital number, since it uses as much as digits as its factorization.

1620167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4872.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1620167 is about 1272.8578082410. The cubic root of 1620167 is about 117.4500647933.

The spelling of 1620167 in words is "one million, six hundred twenty thousand, one hundred sixty-seven".