1573123420 has 72 divisors (see below), whose sum is σ = 3645602352. Its totient is φ = 569775360.

The previous prime is 1573123381. The next prime is 1573123423. The reversal of 1573123420 is 243213751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1573123423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 683712 + ... + 686008.

It is an arithmetic number, because the mean of its divisors is an integer number (50633366).

Almost surely, 2^1573123420 is an apocalyptic number.

1573123420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1573123420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1822801176).

1573123420 is an abundant number, since it is smaller than the sum of its proper divisors (2072478932).

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

1573123420 is a wasteful number, since it uses less digits than its factorization.

1573123420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2611 (or 2598 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 1573123420 is about 39662.6199336352. The cubic root of 1573123420 is about 1163.0211132654.

The spelling of 1573123420 in words is "one billion, five hundred seventy-three million, one hundred twenty-three thousand, four hundred twenty".