1266365131 has 4 divisors (see below), whose sum is σ = 1266441264. Its totient is φ = 1266289000.

The previous prime is 1266365129. The next prime is 1266365153. The reversal of 1266365131 is 1315636621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1266365131 - 2¹ = 1266365129 is a prime.

It is a super-2 number, since 2×1266365131² = 3207361290025294322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266365101) 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, 1240 + ... + 50341.

It is an arithmetic number, because the mean of its divisors is an integer number (316610316).

Almost surely, 2^1266365131 is an apocalyptic number.

1266365131 is a deficient number, since it is larger than the sum of its proper divisors (76133).

1266365131 is an equidigital number, since it uses as much as digits as its factorization.

1266365131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76132.

The product of its digits is 19440, while the sum is 34.

The square root of 1266365131 is about 35586.0243775559. The cubic root of 1266365131 is about 1081.8979916770.

The spelling of 1266365131 in words is "one billion, two hundred sixty-six million, three hundred sixty-five thousand, one hundred thirty-one".