1620467 has 2 divisors, whose sum is σ = 1620468. Its totient is φ = 1620466.

The previous prime is 1620461. The next prime is 1620469. The reversal of 1620467 is 7640261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1620467 - 2⁶ = 1620403 is a prime.

Together with 1620469, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1620461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810233 + 810234.

It is an arithmetic number, because the mean of its divisors is an integer number (810234).

2^1620467 is an apocalyptic number.

1620467 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620467 is an equidigital number, since it uses as much as digits as its factorization.

1620467 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 1620467 is about 1272.9756478425. The cubic root of 1620467 is about 117.4573136026.

The spelling of 1620467 in words is "one million, six hundred twenty thousand, four hundred sixty-seven".