1026136021 has 24 divisors (see below), whose sum is σ = 1122115680. Its totient is φ = 935412192.

The previous prime is 1026135989. The next prime is 1026136039. The reversal of 1026136021 is 1206316201.

It is not a de Polignac number, because 1026136021 - 2⁵ = 1026135989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1026135983 and 1026136001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1026136081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4520310 + ... + 4520536.

It is an arithmetic number, because the mean of its divisors is an integer number (46754820).

Almost surely, 2^1026136021 is an apocalyptic number.

It is an amenable number.

1026136021 is a deficient number, since it is larger than the sum of its proper divisors (95979659).

1026136021 is an equidigital number, since it uses as much as digits as its factorization.

1026136021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1026136021 is about 32033.3579413711. The cubic root of 1026136021 is about 1008.6371911478.

The spelling of 1026136021 in words is "one billion, twenty-six million, one hundred thirty-six thousand, twenty-one".