655242401 has 4 divisors (see below), whose sum is σ = 714809904. Its totient is φ = 595674900.

The previous prime is 655242397. The next prime is 655242409. The reversal of 655242401 is 104242556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 655242401 - 2² = 655242397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (655242409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29783735 + ... + 29783756.

It is an arithmetic number, because the mean of its divisors is an integer number (178702476).

Almost surely, 2^655242401 is an apocalyptic number.

It is an amenable number.

655242401 is a deficient number, since it is larger than the sum of its proper divisors (59567503).

655242401 is a wasteful number, since it uses less digits than its factorization.

655242401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59567502.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 655242401 is about 25597.7030414840. The cubic root of 655242401 is about 868.5616789945.

Adding to 655242401 its reverse (104242556), we get a palindrome (759484957).

The spelling of 655242401 in words is "six hundred fifty-five million, two hundred forty-two thousand, four hundred one".