1266290945 has 32 divisors (see below), whose sum is σ = 1662474240. Its totient is φ = 923328000.

The previous prime is 1266290941. The next prime is 1266290947. The reversal of 1266290945 is 5490926621.

It is not a de Polignac number, because 1266290945 - 2² = 1266290941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1266290896 and 1266290905.

It is not an unprimeable number, because it can be changed into a prime (1266290941) 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, 180860 + ... + 187730.

It is an arithmetic number, because the mean of its divisors is an integer number (51952320).

Almost surely, 2^1266290945 is an apocalyptic number.

It is an amenable number.

1266290945 is a deficient number, since it is larger than the sum of its proper divisors (396183295).

1266290945 is a wasteful number, since it uses less digits than its factorization.

1266290945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6977.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 1266290945 is about 35584.9820148894. The cubic root of 1266290945 is about 1081.8768647393.

The spelling of 1266290945 in words is "one billion, two hundred sixty-six million, two hundred ninety thousand, nine hundred forty-five".