1025200001 has 12 divisors (see below), whose sum is σ = 1193234580. Its totient is φ = 878260320.

The previous prime is 1025199997. The next prime is 1025200003. The reversal of 1025200001 is 1000025201.

It can be written as a sum of positive squares in 2 ways, for example, as 469372225 + 555827776 = 21665^2 + 23576^2 .

It is not a de Polignac number, because 1025200001 - 2² = 1025199997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025200003) 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, 106571 + ... + 115791.

It is an arithmetic number, because the mean of its divisors is an integer number (99436215).

Almost surely, 2^1025200001 is an apocalyptic number.

It is an amenable number.

1025200001 is a deficient number, since it is larger than the sum of its proper divisors (168034579).

1025200001 is an equidigital number, since it uses as much as digits as its factorization.

1025200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11504 (or 11497 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 1025200001 is about 32018.7445256681. The cubic root of 1025200001 is about 1008.3304118729.

Adding to 1025200001 its reverse (1000025201), we get a palindrome (2025225202).

The spelling of 1025200001 in words is "one billion, twenty-five million, two hundred thousand, one".