1205266825349 has 4 divisors (see below), whose sum is σ = 1268701921440. Its totient is φ = 1141831729260.

The previous prime is 1205266825309. The next prime is 1205266825421. The reversal of 1205266825349 is 9435286625021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1205266825349 - 2²⁴ = 1205250048133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1205266825349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205266825309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31717548017 + ... + 31717548054.

It is an arithmetic number, because the mean of its divisors is an integer number (317175480360).

Almost surely, 2^{1205266825349} is an apocalyptic number.

1205266825349 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1205266825349 is a deficient number, since it is larger than the sum of its proper divisors (63435096091).

1205266825349 is an equidigital number, since it uses as much as digits as its factorization.

1205266825349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63435096090.

The product of its (nonzero) digits is 6220800, while the sum is 53.

The spelling of 1205266825349 in words is "one trillion, two hundred five billion, two hundred sixty-six million, eight hundred twenty-five thousand, three hundred forty-nine".