1266204045 has 16 divisors (see below), whose sum is σ = 2026445760. Its totient is φ = 675135744.

The previous prime is 1266204019. The next prime is 1266204067. The reversal of 1266204045 is 5404026621.

It is not a de Polignac number, because 1266204045 - 2⁸ = 1266203789 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68341 + ... + 84869.

It is an arithmetic number, because the mean of its divisors is an integer number (126652860).

Almost surely, 2^1266204045 is an apocalyptic number.

1266204045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1266204045 is a deficient number, since it is larger than the sum of its proper divisors (760241715).

1266204045 is a wasteful number, since it uses less digits than its factorization.

1266204045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21644.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1266204045 is about 35583.7609732305. The cubic root of 1266204045 is about 1081.8521160166.

The spelling of 1266204045 in words is "one billion, two hundred sixty-six million, two hundred four thousand, forty-five".