1266154013 has 2 divisors, whose sum is σ = 1266154014. Its totient is φ = 1266154012.

The previous prime is 1266153997. The next prime is 1266154027. The reversal of 1266154013 is 3104516621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1219546084 + 46607929 = 34922^2 + 6827^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266154013 - 2⁴ = 1266153997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1266154913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633077006 + 633077007.

It is an arithmetic number, because the mean of its divisors is an integer number (633077007).

Almost surely, 2^1266154013 is an apocalyptic number.

It is an amenable number.

1266154013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266154013 is an equidigital number, since it uses as much as digits as its factorization.

1266154013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1266154013 is about 35583.0579489734. The cubic root of 1266154013 is about 1081.8378666181.

The spelling of 1266154013 in words is "one billion, two hundred sixty-six million, one hundred fifty-four thousand, thirteen".