1020045123 has 8 divisors (see below), whose sum is σ = 1511178000. Its totient is φ = 680030064.

The previous prime is 1020045121. The next prime is 1020045127. The reversal of 1020045123 is 3215400201.

1020045123 is a `hidden beast` number, since 10 + 200 + 451 + 2 + 3 = 666.

It is not a de Polignac number, because 1020045123 - 2¹ = 1020045121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020045096 and 1020045105.

It is not an unprimeable number, because it can be changed into a prime (1020045121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18889698 + ... + 18889751.

It is an arithmetic number, because the mean of its divisors is an integer number (188897250).

Almost surely, 2^1020045123 is an apocalyptic number.

1020045123 is a deficient number, since it is larger than the sum of its proper divisors (491132877).

1020045123 is an equidigital number, since it uses as much as digits as its factorization.

1020045123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37779458 (or 37779452 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1020045123 is about 31938.1452654972. The cubic root of 1020045123 is about 1006.6375530787.

Adding to 1020045123 its reverse (3215400201), we get a palindrome (4235445324).

The spelling of 1020045123 in words is "one billion, twenty million, forty-five thousand, one hundred twenty-three".