1020123345 has 8 divisors (see below), whose sum is σ = 1632197376. Its totient is φ = 544065776.

The previous prime is 1020123329. The next prime is 1020123361. The reversal of 1020123345 is 5433210201.

It is an interprime number because it is at equal distance from previous prime (1020123329) and next prime (1020123361).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1020123345 - 2⁴ = 1020123329 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 34004097 + ... + 34004126.

It is an arithmetic number, because the mean of its divisors is an integer number (204024672).

Almost surely, 2^1020123345 is an apocalyptic number.

1020123345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020123345 is a deficient number, since it is larger than the sum of its proper divisors (612074031).

1020123345 is an equidigital number, since it uses as much as digits as its factorization.

1020123345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68008231.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1020123345 is about 31939.3698278473. The cubic root of 1020123345 is about 1006.6632837018.

Adding to 1020123345 its reverse (5433210201), we get a palindrome (6453333546).

The spelling of 1020123345 in words is "one billion, twenty million, one hundred twenty-three thousand, three hundred forty-five".