425120121 has 12 divisors (see below), whose sum is σ = 630659172. Its totient is φ = 275753376.

The previous prime is 425120083. The next prime is 425120149. The reversal of 425120121 is 121021524.

425120121 is a `hidden beast` number, since 425 + 120 + 121 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 175827600 + 249292521 = 13260^2 + 15789^2 .

It is not a de Polignac number, because 425120121 - 2¹¹ = 425118073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 425120094 and 425120103.

It is not an unprimeable number, because it can be changed into a prime (425120191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 637986 + ... + 638651.

It is an arithmetic number, because the mean of its divisors is an integer number (52554931).

Almost surely, 2^425120121 is an apocalyptic number.

It is an amenable number.

425120121 is a deficient number, since it is larger than the sum of its proper divisors (205539051).

425120121 is a wasteful number, since it uses less digits than its factorization.

425120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276680 (or 1276677 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 425120121 is about 20618.4412844424. The cubic root of 425120121 is about 751.9181248806.

Adding to 425120121 its reverse (121021524), we get a palindrome (546141645).

The spelling of 425120121 in words is "four hundred twenty-five million, one hundred twenty thousand, one hundred twenty-one".