640514 has 8 divisors (see below), whose sum is σ = 1098048. Its totient is φ = 274500.

The previous prime is 640499. The next prime is 640529. The reversal of 640514 is 415046.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (640499) and next prime (640529).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 640514.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22862 + ... + 22889.

It is an arithmetic number, because the mean of its divisors is an integer number (137256).

2⁶⁴⁰⁵¹⁴ is an apocalyptic number.

640514 is a deficient number, since it is larger than the sum of its proper divisors (457534).

640514 is a wasteful number, since it uses less digits than its factorization.

640514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45760.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 640514 is about 800.3211855249. The cubic root of 640514 is about 86.2004518327.

The spelling of 640514 in words is "six hundred forty thousand, five hundred fourteen".