425420405 has 8 divisors (see below), whose sum is σ = 518873784. Its totient is φ = 334756800.

The previous prime is 425420377. The next prime is 425420423. The reversal of 425420405 is 504024524.

It can be written as a sum of positive squares in 4 ways, for example, as 31516996 + 393903409 = 5614^2 + 19847^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-425420405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 697106 + ... + 697715.

It is an arithmetic number, because the mean of its divisors is an integer number (64859223).

Almost surely, 2^425420405 is an apocalyptic number.

It is an amenable number.

425420405 is a deficient number, since it is larger than the sum of its proper divisors (93453379).

425420405 is a wasteful number, since it uses less digits than its factorization.

425420405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394887.

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 425420405 is about 20625.7219267593. The cubic root of 425420405 is about 752.0951225728.

Adding to 425420405 its reverse (504024524), we get a palindrome (929444929).

The spelling of 425420405 in words is "four hundred twenty-five million, four hundred twenty thousand, four hundred five".