1025812281 has 16 divisors (see below), whose sum is σ = 1475714240. Its totient is φ = 630089280.

The previous prime is 1025812241. The next prime is 1025812313. The reversal of 1025812281 is 1822185201.

It is not a de Polignac number, because 1025812281 - 2⁷ = 1025812153 is a prime.

It is a super-2 number, since 2×1025812281² = 2104581671700845922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1025812231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3211 + ... + 45408.

It is an arithmetic number, because the mean of its divisors is an integer number (92232140).

Almost surely, 2^1025812281 is an apocalyptic number.

It is an amenable number.

1025812281 is a deficient number, since it is larger than the sum of its proper divisors (449901959).

1025812281 is a wasteful number, since it uses less digits than its factorization.

1025812281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49176.

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 1025812281 is about 32028.3043728512. The cubic root of 1025812281 is about 1008.5311069174.

Adding to 1025812281 its reverse (1822185201), we get a palindrome (2847997482).

The spelling of 1025812281 in words is "one billion, twenty-five million, eight hundred twelve thousand, two hundred eighty-one".