425821405 has 8 divisors (see below), whose sum is σ = 512503992. Its totient is φ = 339644928.

The previous prime is 425821343. The next prime is 425821411. The reversal of 425821405 is 504128524.

It can be written as a sum of positive squares in 4 ways, for example, as 24740676 + 401080729 = 4974^2 + 20027^2 .

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 425821405 - 2¹¹ = 425819357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124672 + ... + 128041.

It is an arithmetic number, because the mean of its divisors is an integer number (64062999).

Almost surely, 2^425821405 is an apocalyptic number.

It is an amenable number.

425821405 is a deficient number, since it is larger than the sum of its proper divisors (86682587).

425821405 is a wasteful number, since it uses less digits than its factorization.

425821405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253055.

The product of its (nonzero) digits is 12800, while the sum is 31.

The square root of 425821405 is about 20635.4405089884. The cubic root of 425821405 is about 752.3313559009.

Adding to 425821405 its reverse (504128524), we get a palindrome (929949929).

The spelling of 425821405 in words is "four hundred twenty-five million, eight hundred twenty-one thousand, four hundred five".