641516 has 24 divisors (see below), whose sum is σ = 1236480. Its totient is φ = 289872.

The previous prime is 641513. The next prime is 641519. The reversal of 641516 is 615146.

It is an interprime number because it is at equal distance from previous prime (641513) and next prime (641519).

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 641491 and 641500.

It is not an unprimeable number, because it can be changed into a prime (641513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1565 + ... + 1931.

It is an arithmetic number, because the mean of its divisors is an integer number (51520).

2⁶⁴¹⁵¹⁶ is an apocalyptic number.

It is an amenable number.

641516 is a deficient number, since it is larger than the sum of its proper divisors (594964).

641516 is a wasteful number, since it uses less digits than its factorization.

641516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413 (or 411 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 641516 is about 800.9469395659. The cubic root of 641516 is about 86.2453781742.

The spelling of 641516 in words is "six hundred forty-one thousand, five hundred sixteen".