1351012520 has 128 divisors (see below), whose sum is σ = 3589246080. Its totient is φ = 451200000.

The previous prime is 1351012517. The next prime is 1351012549. The reversal of 1351012520 is 252101531.

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 = 1351012492 and 1351012501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1435250 + ... + 1436190.

It is an arithmetic number, because the mean of its divisors is an integer number (28040985).

Almost surely, 2^1351012520 is an apocalyptic number.

1351012520 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 1351012520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1794623040).

1351012520 is an abundant number, since it is smaller than the sum of its proper divisors (2238233560).

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

1351012520 is a wasteful number, since it uses less digits than its factorization.

1351012520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227 (or 1223 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1351012520 is about 36756.1222111365. The cubic root of 1351012520 is about 1105.4856883628.

The spelling of 1351012520 in words is "one billion, three hundred fifty-one million, twelve thousand, five hundred twenty".