1266261906 has 48 divisors (see below), whose sum is σ = 3134096064. Its totient is φ = 333957312.

The previous prime is 1266261833. The next prime is 1266261907. The reversal of 1266261906 is 6091626621.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1266261907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82101 + ... + 96296.

It is an arithmetic number, because the mean of its divisors is an integer number (65293668).

Almost surely, 2^1266261906 is an apocalyptic number.

1266261906 is an abundant number, since it is smaller than the sum of its proper divisors (1867834158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1266261906 is a wasteful number, since it uses less digits than its factorization.

1266261906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178435 (or 178422 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 1266261906 is about 35584.5739893005. The cubic root of 1266261906 is about 1081.8685946908.

The spelling of 1266261906 in words is "one billion, two hundred sixty-six million, two hundred sixty-one thousand, nine hundred six".