1266455157 has 8 divisors (see below), whose sum is σ = 1842116640. Its totient is φ = 767548560.

The previous prime is 1266455153. The next prime is 1266455159. The reversal of 1266455157 is 7515546621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1266455157 - 2² = 1266455153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266455153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19188682 + ... + 19188747.

It is an arithmetic number, because the mean of its divisors is an integer number (230264580).

Almost surely, 2^1266455157 is an apocalyptic number.

It is an amenable number.

1266455157 is a deficient number, since it is larger than the sum of its proper divisors (575661483).

1266455157 is a wasteful number, since it uses less digits than its factorization.

1266455157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38377443.

The product of its digits is 252000, while the sum is 42.

The square root of 1266455157 is about 35587.2892617575. The cubic root of 1266455157 is about 1081.9236284749.

The spelling of 1266455157 in words is "one billion, two hundred sixty-six million, four hundred fifty-five thousand, one hundred fifty-seven".