1906601 has 4 divisors (see below), whose sum is σ = 2018772. Its totient is φ = 1794432.

The previous prime is 1906589. The next prime is 1906603. The reversal of 1906601 is 1066091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1066091 = 13 ⋅82007.

It can be written as a sum of positive squares in 2 ways, for example, as 1345600 + 561001 = 1160^2 + 749^2 .

It is a cyclic number.

It is not a de Polignac number, because 1906601 - 2⁶ = 1906537 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1906603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56060 + ... + 56093.

It is an arithmetic number, because the mean of its divisors is an integer number (504693).

2^1906601 is an apocalyptic number.

It is an amenable number.

1906601 is a deficient number, since it is larger than the sum of its proper divisors (112171).

1906601 is a wasteful number, since it uses less digits than its factorization.

1906601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112170.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1906601 is about 1380.7972334851. The cubic root of 1906601 is about 123.9995013854. Note that the first 3 decimals are identical.

Adding to 1906601 its sum of digits (23), we get a cube (1906624 = 124³).

The spelling of 1906601 in words is "one million, nine hundred six thousand, six hundred one".