1305145397 has 16 divisors (see below), whose sum is σ = 1412505600. Its totient is φ = 1202007600.

The previous prime is 1305145351. The next prime is 1305145421. The reversal of 1305145397 is 7935415031.

It is a cyclic number.

It is not a de Polignac number, because 1305145397 - 2¹⁴ = 1305129013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1305145397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305135397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130004 + ... + 139682.

It is an arithmetic number, because the mean of its divisors is an integer number (88281600).

Almost surely, 2^1305145397 is an apocalyptic number.

It is an amenable number.

1305145397 is a deficient number, since it is larger than the sum of its proper divisors (107360203).

1305145397 is a wasteful number, since it uses less digits than its factorization.

1305145397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9896.

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 1305145397 is about 36126.7961075986. The cubic root of 1305145397 is about 1092.8308976779.

The spelling of 1305145397 in words is "one billion, three hundred five million, one hundred forty-five thousand, three hundred ninety-seven".