620961 has 16 divisors (see below), whose sum is σ = 933888. Its totient is φ = 363600.

The previous prime is 620957. The next prime is 620981. The reversal of 620961 is 169026.

620961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 620961 - 2² = 620957 is a prime.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (620911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 720 + ... + 1326.

It is an arithmetic number, because the mean of its divisors is an integer number (58368).

2⁶²⁰⁹⁶¹ is an apocalyptic number.

It is an amenable number.

620961 is a deficient number, since it is larger than the sum of its proper divisors (312927).

620961 is a wasteful number, since it uses less digits than its factorization.

620961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 620961 is about 788.0107867282. The cubic root of 620961 is about 85.3142233547.

Adding to 620961 its reverse (169026), we get a palindrome (789987).

The spelling of 620961 in words is "six hundred twenty thousand, nine hundred sixty-one".