1021735126 has 16 divisors (see below), whose sum is σ = 1591660224. Its totient is φ = 491536584.

The previous prime is 1021735123. The next prime is 1021735147. The reversal of 1021735126 is 6215371201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1021735094 and 1021735103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021735123) 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 7 ways as a sum of consecutive naturals, for example, 82900 + ... + 94423.

It is an arithmetic number, because the mean of its divisors is an integer number (99478764).

Almost surely, 2^1021735126 is an apocalyptic number.

1021735126 is a deficient number, since it is larger than the sum of its proper divisors (569925098).

1021735126 is a wasteful number, since it uses less digits than its factorization.

1021735126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177435.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 1021735126 is about 31964.5917540018. The cubic root of 1021735126 is about 1007.1931761542.

The spelling of 1021735126 in words is "one billion, twenty-one million, seven hundred thirty-five thousand, one hundred twenty-six".