655101421 has 8 divisors (see below), whose sum is σ = 709720704. Its totient is φ = 601086000.

The previous prime is 655101407. The next prime is 655101427. The reversal of 655101421 is 124101556.

It is a happy number.

655101421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 655101421 - 2²³ = 646712813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655101427) 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, 148705 + ... + 153046.

It is an arithmetic number, because the mean of its divisors is an integer number (88715088).

Almost surely, 2^655101421 is an apocalyptic number.

It is an amenable number.

655101421 is a deficient number, since it is larger than the sum of its proper divisors (54619283).

655101421 is a wasteful number, since it uses less digits than its factorization.

655101421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301931.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 655101421 is about 25594.9491306390. The cubic root of 655101421 is about 868.4993821466.

Adding to 655101421 its reverse (124101556), we get a palindrome (779202977).

The spelling of 655101421 in words is "six hundred fifty-five million, one hundred one thousand, four hundred twenty-one".