1043320520 has 32 divisors (see below), whose sum is σ = 2560878720. Its totient is φ = 379389120.

The previous prime is 1043320511. The next prime is 1043320547. The reversal of 1043320520 is 250233401.

It is a happy number.

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 = 1043320492 and 1043320501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1185152 + ... + 1186031.

It is an arithmetic number, because the mean of its divisors is an integer number (80027460).

Almost surely, 2^1043320520 is an apocalyptic number.

1043320520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1043320520 is an abundant number, since it is smaller than the sum of its proper divisors (1517558200).

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

1043320520 is a wasteful number, since it uses less digits than its factorization.

1043320520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371205 (or 2371201 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 1043320520 is about 32300.4724423653. The cubic root of 1043320520 is about 1014.2365326565.

Adding to 1043320520 its reverse (250233401), we get a palindrome (1293553921).

The spelling of 1043320520 in words is "one billion, forty-three million, three hundred twenty thousand, five hundred twenty".