1299226605 has 16 divisors (see below), whose sum is σ = 2080499904. Its totient is φ = 692341760.

The previous prime is 1299226603. The next prime is 1299226613. The reversal of 1299226605 is 5066229921.

It is not a de Polignac number, because 1299226605 - 2¹ = 1299226603 is a prime.

It is a super-2 number, since 2×1299226605² = 3375979542279652050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299226603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17331 + ... + 53840.

It is an arithmetic number, because the mean of its divisors is an integer number (130031244).

Almost surely, 2^1299226605 is an apocalyptic number.

1299226605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1299226605 is a deficient number, since it is larger than the sum of its proper divisors (781273299).

1299226605 is a wasteful number, since it uses less digits than its factorization.

1299226605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72396.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 1299226605 is about 36044.7861000728. The cubic root of 1299226605 is about 1091.1764099226.

The spelling of 1299226605 in words is "one billion, two hundred ninety-nine million, two hundred twenty-six thousand, six hundred five".