1640051 has 4 divisors (see below), whose sum is σ = 1874352. Its totient is φ = 1405752.

The previous prime is 1640033. The next prime is 1640053. The reversal of 1640051 is 1500461.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1640051 - 2⁶ = 1639987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1640053) 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, 117140 + ... + 117153.

It is an arithmetic number, because the mean of its divisors is an integer number (468588).

2^1640051 is an apocalyptic number.

1640051 is a deficient number, since it is larger than the sum of its proper divisors (234301).

1640051 is an equidigital number, since it uses as much as digits as its factorization.

1640051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234300.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1640051 is about 1280.6447594864. The cubic root of 1640051 is about 117.9285932046.

The spelling of 1640051 in words is "one million, six hundred forty thousand, fifty-one".