606406121 has 4 divisors (see below), whose sum is σ = 612410244. Its totient is φ = 600402000.

The previous prime is 606406117. The next prime is 606406123. The reversal of 606406121 is 121604606.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 598340521 + 8065600 = 24461^2 + 2840^2 .

It is a cyclic number.

It is not a de Polignac number, because 606406121 - 2² = 606406117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (606406123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3001910 + ... + 3002111.

It is an arithmetic number, because the mean of its divisors is an integer number (153102561).

Almost surely, 2^606406121 is an apocalyptic number.

It is an amenable number.

606406121 is a deficient number, since it is larger than the sum of its proper divisors (6004123).

606406121 is a wasteful number, since it uses less digits than its factorization.

606406121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6004122.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 606406121 is about 24625.3146375838. The cubic root of 606406121 is about 846.4237849999.

The spelling of 606406121 in words is "six hundred six million, four hundred six thousand, one hundred twenty-one".