1269306057 has 4 divisors (see below), whose sum is σ = 1692408080. Its totient is φ = 846204036.

The previous prime is 1269306043. The next prime is 1269306079. The reversal of 1269306057 is 7506039621.

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 not a de Polignac number, because 1269306057 - 2¹⁰ = 1269305033 is a prime.

It is a super-2 number, since 2×1269306057² = 3222275732673774498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1269306007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211551007 + ... + 211551012.

It is an arithmetic number, because the mean of its divisors is an integer number (423102020).

Almost surely, 2^1269306057 is an apocalyptic number.

It is an amenable number.

1269306057 is a deficient number, since it is larger than the sum of its proper divisors (423102023).

1269306057 is an equidigital number, since it uses as much as digits as its factorization.

1269306057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423102022.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 1269306057 is about 35627.3217769734. The cubic root of 1269306057 is about 1082.7348545933.

The spelling of 1269306057 in words is "one billion, two hundred sixty-nine million, three hundred six thousand, fifty-seven".