1423120520 has 64 divisors (see below), whose sum is σ = 3442348800. Its totient is φ = 527800320.

The previous prime is 1423120519. The next prime is 1423120547. The reversal of 1423120520 is 250213241.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1423120492 and 1423120501.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15800 + ... + 55640.

It is an arithmetic number, because the mean of its divisors is an integer number (53786700).

Almost surely, 2^1423120520 is an apocalyptic number.

1423120520 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 1423120520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1721174400).

1423120520 is an abundant number, since it is smaller than the sum of its proper divisors (2019228280).

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

1423120520 is a wasteful number, since it uses less digits than its factorization.

1423120520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39918 (or 39914 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1423120520 is about 37724.2696417041. The cubic root of 1423120520 is about 1124.8136040157.

Adding to 1423120520 its reverse (250213241), we get a palindrome (1673333761).

The spelling of 1423120520 in words is "one billion, four hundred twenty-three million, one hundred twenty thousand, five hundred twenty".