1020126556 has 24 divisors (see below), whose sum is σ = 1836968336. Its totient is φ = 495331200.

The previous prime is 1020126491. The next prime is 1020126557. The reversal of 1020126556 is 6556210201.

It is a super-2 number, since 2×1020126556² = 2081316380512842272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020126557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74656 + ... + 87256.

Almost surely, 2^1020126556 is an apocalyptic number.

It is an amenable number.

1020126556 is a deficient number, since it is larger than the sum of its proper divisors (816841780).

1020126556 is a wasteful number, since it uses less digits than its factorization.

1020126556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13189 (or 13187 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1020126556 is about 31939.4200949235. The cubic root of 1020126556 is about 1006.6643399115.

Adding to 1020126556 its reverse (6556210201), we get a palindrome (7576336757).

The spelling of 1020126556 in words is "one billion, twenty million, one hundred twenty-six thousand, five hundred fifty-six".