1305115140 has 48 divisors (see below), whose sum is σ = 4176369792. Its totient is φ = 298311936.

The previous prime is 1305115127. The next prime is 1305115153. The reversal of 1305115140 is 415115031.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1305115127) and next prime (1305115153).

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 1553289 + ... + 1554128.

It is an arithmetic number, because the mean of its divisors is an integer number (87007704).

Almost surely, 2^1305115140 is an apocalyptic number.

1305115140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1305115140 is an abundant number, since it is smaller than the sum of its proper divisors (2871254652).

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

1305115140 is a wasteful number, since it uses less digits than its factorization.

1305115140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107436 (or 3107434 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1305115140 is about 36126.3773439851. The cubic root of 1305115140 is about 1092.8224526315.

The spelling of 1305115140 in words is "one billion, three hundred five million, one hundred fifteen thousand, one hundred forty".