1300145561 has 12 divisors (see below), whose sum is σ = 1535838480. Its totient is φ = 1091029680.

The previous prime is 1300145531. The next prime is 1300145563. The reversal of 1300145561 is 1655410031.

It is a de Polignac number, because none of the positive numbers 2^k-1300145561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1300145561.

It is not an unprimeable number, because it can be changed into a prime (1300145563) 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, 347831 + ... + 351548.

It is an arithmetic number, because the mean of its divisors is an integer number (127986540).

Almost surely, 2^1300145561 is an apocalyptic number.

1300145561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1300145561 is a deficient number, since it is larger than the sum of its proper divisors (235692919).

1300145561 is a wasteful number, since it uses less digits than its factorization.

1300145561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699416 (or 699403 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1300145561 is about 36057.5312660199. The cubic root of 1300145561 is about 1091.4336159612.

Adding to 1300145561 its reverse (1655410031), we get a palindrome (2955555592).

The spelling of 1300145561 in words is "one billion, three hundred million, one hundred forty-five thousand, five hundred sixty-one".