1640601 has 8 divisors (see below), whose sum is σ = 2430560. Its totient is φ = 1093716.

The previous prime is 1640599. The next prime is 1640609. The reversal of 1640601 is 1060461.

1640601 is a `hidden beast` number, since 1 + 64 + 0 + 601 = 666.

It is not a de Polignac number, because 1640601 - 2¹ = 1640599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1640609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30355 + ... + 30408.

It is an arithmetic number, because the mean of its divisors is an integer number (303820).

2^1640601 is an apocalyptic number.

It is an amenable number.

1640601 is a deficient number, since it is larger than the sum of its proper divisors (789959).

1640601 is an equidigital number, since it uses as much as digits as its factorization.

1640601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60772 (or 60766 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1640601 is about 1280.8594770700. The cubic root of 1640601 is about 117.9417743957.

The spelling of 1640601 in words is "one million, six hundred forty thousand, six hundred one".