1266262957 has 4 divisors (see below), whose sum is σ = 1278800316. Its totient is φ = 1253725600.

The previous prime is 1266262937. The next prime is 1266262967. The reversal of 1266262957 is 7592626621.

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 917544681 + 348718276 = 30291^2 + 18674^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1266262957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266262937) 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, 6268528 + ... + 6268729.

It is an arithmetic number, because the mean of its divisors is an integer number (319700079).

Almost surely, 2^1266262957 is an apocalyptic number.

It is an amenable number.

1266262957 is a deficient number, since it is larger than the sum of its proper divisors (12537359).

1266262957 is a wasteful number, since it uses less digits than its factorization.

1266262957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12537358.

The product of its digits is 544320, while the sum is 46.

The square root of 1266262957 is about 35584.5887569324. The cubic root of 1266262957 is about 1081.8688940085.

The spelling of 1266262957 in words is "one billion, two hundred sixty-six million, two hundred sixty-two thousand, nine hundred fifty-seven".