1021745830 has 64 divisors (see below), whose sum is σ = 2160369792. Its totient is φ = 340623360.

The previous prime is 1021745821. The next prime is 1021745873. The reversal of 1021745830 is 385471201.

It is a super-2 number, since 2×1021745830² = 2087929082244777800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1021745792 and 1021745801.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1655682 + ... + 1656298.

It is an arithmetic number, because the mean of its divisors is an integer number (33755778).

Almost surely, 2^1021745830 is an apocalyptic number.

1021745830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021745830 is an abundant number, since it is smaller than the sum of its proper divisors (1138623962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021745830 is a wasteful number, since it uses less digits than its factorization.

1021745830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 1021745830 is about 31964.7591888317. The cubic root of 1021745830 is about 1007.1966933600.

The spelling of 1021745830 in words is "one billion, twenty-one million, seven hundred forty-five thousand, eight hundred thirty".