646954 has 16 divisors (see below), whose sum is σ = 1210176. Its totient is φ = 252000.

The previous prime is 646937. The next prime is 646957. The reversal of 646954 is 459646.

It is an Ulam number.

It is a pancake number, because a pancake can be divided into 646954 parts by 1137 straight cuts.

It is a nialpdrome in base 7 and base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646957) 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, 1947 + ... + 2254.

It is an arithmetic number, because the mean of its divisors is an integer number (75636).

2⁶⁴⁶⁹⁵⁴ is an apocalyptic number.

646954 is a deficient number, since it is larger than the sum of its proper divisors (563222).

646954 is a wasteful number, since it uses less digits than its factorization.

646954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4221.

The product of its digits is 25920, while the sum is 34.

The square root of 646954 is about 804.3345075278. The cubic root of 646954 is about 86.4883876289.

It can be divided in two parts, 646 and 954, that added together give a square (1600 = 40²).

The spelling of 646954 in words is "six hundred forty-six thousand, nine hundred fifty-four".