1025111128 has 8 divisors (see below), whose sum is σ = 1922083380. Its totient is φ = 512555560.

The previous prime is 1025111089. The next prime is 1025111141. The reversal of 1025111128 is 8211115201.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1025111099 and 1025111108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64069438 + ... + 64069453.

Almost surely, 2^1025111128 is an apocalyptic number.

It is an amenable number.

1025111128 is a deficient number, since it is larger than the sum of its proper divisors (896972252).

1025111128 is a wasteful number, since it uses less digits than its factorization.

1025111128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128138897 (or 128138893 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 22.

The square root of 1025111128 is about 32017.3566679075. The cubic root of 1025111128 is about 1008.3012741638.

Adding to 1025111128 its reverse (8211115201), we get a palindrome (9236226329).

The spelling of 1025111128 in words is "one billion, twenty-five million, one hundred eleven thousand, one hundred twenty-eight".