425145121 has 4 divisors (see below), whose sum is σ = 447521200. Its totient is φ = 402769044.

The previous prime is 425145107. The next prime is 425145137. The reversal of 425145121 is 121541524.

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 425145121 - 2²⁷ = 290927393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425145101) 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, 11188011 + ... + 11188048.

It is an arithmetic number, because the mean of its divisors is an integer number (111880300).

Almost surely, 2^425145121 is an apocalyptic number.

It is an amenable number.

425145121 is a deficient number, since it is larger than the sum of its proper divisors (22376079).

425145121 is a wasteful number, since it uses less digits than its factorization.

425145121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22376078.

The product of its digits is 1600, while the sum is 25.

The square root of 425145121 is about 20619.0475289233. The cubic root of 425145121 is about 751.9328639184.

Adding to 425145121 its reverse (121541524), we get a palindrome (546686645).

The spelling of 425145121 in words is "four hundred twenty-five million, one hundred forty-five thousand, one hundred twenty-one".