1306434121 has 4 divisors (see below), whose sum is σ = 1319902612. Its totient is φ = 1292965632.

The previous prime is 1306434119. The next prime is 1306434131. The reversal of 1306434121 is 1214346031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 867950521 + 438483600 = 29461^2 + 20940^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306434121 - 2¹ = 1306434119 is a prime.

It is a super-2 number, since 2×1306434121² = 3413540225026085282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1306434131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6734100 + ... + 6734293.

It is an arithmetic number, because the mean of its divisors is an integer number (329975653).

Almost surely, 2^1306434121 is an apocalyptic number.

It is an amenable number.

1306434121 is a deficient number, since it is larger than the sum of its proper divisors (13468491).

1306434121 is an equidigital number, since it uses as much as digits as its factorization.

1306434121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13468490.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1306434121 is about 36144.6278304259. The cubic root of 1306434121 is about 1093.1904729705.

The spelling of 1306434121 in words is "one billion, three hundred six million, four hundred thirty-four thousand, one hundred twenty-one".