1601867 has 2 divisors, whose sum is σ = 1601868. Its totient is φ = 1601866.

The previous prime is 1601861. The next prime is 1601869. The reversal of 1601867 is 7681061.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1601867 - 2¹⁴ = 1585483 is a prime.

Together with 1601869, 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 (1601861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800933 + 800934.

It is an arithmetic number, because the mean of its divisors is an integer number (800934).

2^1601867 is an apocalyptic number.

1601867 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601867 is an equidigital number, since it uses as much as digits as its factorization.

1601867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 1601867 is about 1265.6488454544. The cubic root of 1601867 is about 117.0061846878.

The spelling of 1601867 in words is "one million, six hundred one thousand, eight hundred sixty-seven".