1025634681 has 12 divisors (see below), whose sum is σ = 1481878320. Its totient is φ = 683569080.

The previous prime is 1025634671. The next prime is 1025634683. The reversal of 1025634681 is 1864365201.

It is a happy number.

1025634681 is a `hidden beast` number, since 10 + 2 + 5 + 634 + 6 + 8 + 1 = 666.

It is not a de Polignac number, because 1025634681 - 2²⁵ = 992080249 is a prime.

It is a super-2 number, since 2×1025634681² = 2103852997739943522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1025634683) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 24466 + ... + 51476.

It is an arithmetic number, because the mean of its divisors is an integer number (123489860).

Almost surely, 2^1025634681 is an apocalyptic number.

It is an amenable number.

1025634681 is a deficient number, since it is larger than the sum of its proper divisors (456243639).

1025634681 is a wasteful number, since it uses less digits than its factorization.

1025634681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31236 (or 31233 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1025634681 is about 32025.5317051880. The cubic root of 1025634681 is about 1008.4729008610.

Adding to 1025634681 its reverse (1864365201), we get a palindrome (2889999882).

The spelling of 1025634681 in words is "one billion, twenty-five million, six hundred thirty-four thousand, six hundred eighty-one".