1266452890 has 16 divisors (see below), whose sum is σ = 2297567232. Its totient is φ = 502591824.

The previous prime is 1266452857. The next prime is 1266452911. The reversal of 1266452890 is 982546621.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497334 + ... + 499873.

It is an arithmetic number, because the mean of its divisors is an integer number (143597952).

Almost surely, 2^1266452890 is an apocalyptic number.

1266452890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1266452890 is a deficient number, since it is larger than the sum of its proper divisors (1031114342).

1266452890 is a wasteful number, since it uses less digits than its factorization.

1266452890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997341.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 1266452890 is about 35587.2574104833. The cubic root of 1266452890 is about 1081.9229829138.

The spelling of 1266452890 in words is "one billion, two hundred sixty-six million, four hundred fifty-two thousand, eight hundred ninety".