1021611428 has 12 divisors (see below), whose sum is σ = 1794468060. Its totient is φ = 508906272.

The previous prime is 1021611427. The next prime is 1021611431. The reversal of 1021611428 is 8241161201.

1021611428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 38663524 + 982947904 = 6218^2 + 31352^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1021611397 and 1021611406.

It is not an unprimeable number, because it can be changed into a prime (1021611427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473651 + ... + 475802.

It is an arithmetic number, because the mean of its divisors is an integer number (149539005).

Almost surely, 2^1021611428 is an apocalyptic number.

It is an amenable number.

1021611428 is a deficient number, since it is larger than the sum of its proper divisors (772856632).

1021611428 is a wasteful number, since it uses less digits than its factorization.

1021611428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949726 (or 949724 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 1021611428 is about 31962.6567731783. The cubic root of 1021611428 is about 1007.1525286953.

Adding to 1021611428 its reverse (8241161201), we get a palindrome (9262772629).

The spelling of 1021611428 in words is "one billion, twenty-one million, six hundred eleven thousand, four hundred twenty-eight".