1028610121 has 16 divisors (see below), whose sum is σ = 1303452288. Its totient is φ = 788371200.

The previous prime is 1028610103. The next prime is 1028610127. The reversal of 1028610121 is 1210168201.

It is a cyclic number.

It is not a de Polignac number, because 1028610121 - 2²¹ = 1026512969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1028610092 and 1028610101.

It is not an unprimeable number, because it can be changed into a prime (1028610127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104800 + ... + 114193.

It is an arithmetic number, because the mean of its divisors is an integer number (81465768).

Almost surely, 2^1028610121 is an apocalyptic number.

1028610121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1028610121 is a deficient number, since it is larger than the sum of its proper divisors (274842167).

1028610121 is a wasteful number, since it uses less digits than its factorization.

1028610121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219072.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 1028610121 is about 32071.9522480313. The cubic root of 1028610121 is about 1009.4471767997.

Adding to 1028610121 its reverse (1210168201), we get a palindrome (2238778322).

The spelling of 1028610121 in words is "one billion, twenty-eight million, six hundred ten thousand, one hundred twenty-one".