2565420426 has 12 divisors (see below), whose sum is σ = 5558410962. Its totient is φ = 855140136.

The previous prime is 2565420421. The next prime is 2565420439. The reversal of 2565420426 is 6240245652.

It can be written as a sum of positive squares in only one way, i.e., 2565321201 + 99225 = 50649^2 + 315^2 .

It is not an unprimeable number, because it can be changed into a prime (2565420421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71261661 + ... + 71261696.

Almost surely, 2^2565420426 is an apocalyptic number.

2565420426 is an abundant number, since it is smaller than the sum of its proper divisors (2992990536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2565420426 is a wasteful number, since it uses less digits than its factorization.

2565420426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142523365 (or 142523362 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The square root of 2565420426 is about 50649.9795261558. The cubic root of 2565420426 is about 1368.9455765070.

The spelling of 2565420426 in words is "two billion, five hundred sixty-five million, four hundred twenty thousand, four hundred twenty-six".