1667601 has 16 divisors (see below), whose sum is σ = 2661120. Its totient is φ = 1026000.

The previous prime is 1667599. The next prime is 1667609. The reversal of 1667601 is 1067661.

It is not a de Polignac number, because 1667601 - 2¹ = 1667599 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1667609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2025 + ... + 2726.

It is an arithmetic number, because the mean of its divisors is an integer number (166320).

2^1667601 is an apocalyptic number.

It is an amenable number.

1667601 is a deficient number, since it is larger than the sum of its proper divisors (993519).

1667601 is a wasteful number, since it uses less digits than its factorization.

1667601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4773 (or 4767 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1667601 is about 1291.3562637785. The cubic root of 1667601 is about 118.5852615040.

The spelling of 1667601 in words is "one million, six hundred sixty-seven thousand, six hundred one".