1305128151 has 12 divisors (see below), whose sum is σ = 1950191880. Its totient is φ = 840082320.

The previous prime is 1305128137. The next prime is 1305128173. The reversal of 1305128151 is 1518215031.

1305128151 is a `hidden beast` number, since 130 + 512 + 8 + 15 + 1 = 666.

It is not a de Polignac number, because 1305128151 - 2¹⁵ = 1305095383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305128351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2499985 + ... + 2500506.

It is an arithmetic number, because the mean of its divisors is an integer number (162515990).

Almost surely, 2^1305128151 is an apocalyptic number.

1305128151 is a deficient number, since it is larger than the sum of its proper divisors (645063729).

1305128151 is a wasteful number, since it uses less digits than its factorization.

1305128151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000526 (or 5000523 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

The square root of 1305128151 is about 36126.5574197155. The cubic root of 1305128151 is about 1092.8260841542.

The spelling of 1305128151 in words is "one billion, three hundred five million, one hundred twenty-eight thousand, one hundred fifty-one".