1305515140 has 12 divisors (see below), whose sum is σ = 2741581836. Its totient is φ = 522206048.

The previous prime is 1305515093. The next prime is 1305515191. The reversal of 1305515140 is 415155031.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 766625344 + 538889796 = 27688^2 + 23214^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32637859 + ... + 32637898.

It is an arithmetic number, because the mean of its divisors is an integer number (228465153).

Almost surely, 2^1305515140 is an apocalyptic number.

1305515140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1305515140 is an abundant number, since it is smaller than the sum of its proper divisors (1436066696).

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

1305515140 is a wasteful number, since it uses less digits than its factorization.

1305515140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65275766 (or 65275764 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1305515140 is about 36131.9130409670. The cubic root of 1305515140 is about 1092.9340862893.

The spelling of 1305515140 in words is "one billion, three hundred five million, five hundred fifteen thousand, one hundred forty".