1299654905 has 16 divisors (see below), whose sum is σ = 1630779264. Its totient is φ = 992449920.

The previous prime is 1299654899. The next prime is 1299654907. The reversal of 1299654905 is 5094569921.

It is not a de Polignac number, because 1299654905 - 2⁸ = 1299654649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1299654907) 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, 44957 + ... + 67973.

It is an arithmetic number, because the mean of its divisors is an integer number (101923704).

Almost surely, 2^1299654905 is an apocalyptic number.

It is an amenable number.

1299654905 is a deficient number, since it is larger than the sum of its proper divisors (331124359).

1299654905 is a wasteful number, since it uses less digits than its factorization.

1299654905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23536.

The product of its (nonzero) digits is 874800, while the sum is 50.

The square root of 1299654905 is about 36050.7268303983. The cubic root of 1299654905 is about 1091.2963016358.

The spelling of 1299654905 in words is "one billion, two hundred ninety-nine million, six hundred fifty-four thousand, nine hundred five".