655641 has 16 divisors (see below), whose sum is σ = 1110400. Its totient is φ = 374544.

The previous prime is 655637. The next prime is 655643. The reversal of 655641 is 146556.

It is a happy number.

655641 is a `hidden beast` number, since 655 + 6 + 4 + 1 = 666.

It is not a de Polignac number, because 655641 - 2² = 655637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655643) 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, 1546 + ... + 1923.

It is an arithmetic number, because the mean of its divisors is an integer number (69400).

2⁶⁵⁵⁶⁴¹ is an apocalyptic number.

It is an amenable number.

655641 is a deficient number, since it is larger than the sum of its proper divisors (454759).

655641 is a wasteful number, since it uses less digits than its factorization.

655641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3485 (or 3479 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 655641 is about 809.7166170951. The cubic root of 655641 is about 86.8737765299.

It can be divided in two parts, 655 and 641, that added together give a 4-th power (1296 = 6⁴).

The spelling of 655641 in words is "six hundred fifty-five thousand, six hundred forty-one".