1266345225 has 48 divisors (see below), whose sum is σ = 2361128640. Its totient is φ = 665280000.

The previous prime is 1266345211. The next prime is 1266345259. The reversal of 1266345225 is 5225436621.

1266345225 is a `hidden beast` number, since 12 + 6 + 634 + 5 + 2 + 2 + 5 = 666.

It is not a de Polignac number, because 1266345225 - 2⁷ = 1266345097 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1266345225.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31225 + ... + 59225.

It is an arithmetic number, because the mean of its divisors is an integer number (49190180).

Almost surely, 2^1266345225 is an apocalyptic number.

1266345225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1266345225 is a deficient number, since it is larger than the sum of its proper divisors (1094783415).

1266345225 is a wasteful number, since it uses less digits than its factorization.

1266345225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28087 (or 28076 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 1266345225 is about 35585.7446880067. The cubic root of 1266345225 is about 1081.8923228606.

The spelling of 1266345225 in words is "one billion, two hundred sixty-six million, three hundred forty-five thousand, two hundred twenty-five".