1305015320 has 32 divisors (see below), whose sum is σ = 3355754400. Its totient is φ = 447433728.

The previous prime is 1305015317. The next prime is 1305015329. The reversal of 1305015320 is 235105031.

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 = 1305015292 and 1305015301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305015329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2330105 + ... + 2330664.

It is an arithmetic number, because the mean of its divisors is an integer number (104867325).

Almost surely, 2^1305015320 is an apocalyptic number.

1305015320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1305015320 is an abundant number, since it is smaller than the sum of its proper divisors (2050739080).

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

1305015320 is a wasteful number, since it uses less digits than its factorization.

1305015320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4660787 (or 4660783 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 1305015320 is about 36124.9957785465. The cubic root of 1305015320 is about 1092.7945908961.

The spelling of 1305015320 in words is "one billion, three hundred five million, fifteen thousand, three hundred twenty".