1266426915 has 32 divisors (see below), whose sum is σ = 2197896960. Its totient is φ = 618973056.

The previous prime is 1266426913. The next prime is 1266426919. The reversal of 1266426915 is 5196246621.

It is not a de Polignac number, because 1266426915 - 2¹ = 1266426913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1266426913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3744 + ... + 50466.

It is an arithmetic number, because the mean of its divisors is an integer number (68684280).

Almost surely, 2^1266426915 is an apocalyptic number.

1266426915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1266426915 is a deficient number, since it is larger than the sum of its proper divisors (931470045).

1266426915 is a wasteful number, since it uses less digits than its factorization.

1266426915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46883.

The product of its digits is 155520, while the sum is 42.

The square root of 1266426915 is about 35586.8924605676. The cubic root of 1266426915 is about 1081.9155861019.

The spelling of 1266426915 in words is "one billion, two hundred sixty-six million, four hundred twenty-six thousand, nine hundred fifteen".