1266860451 has 8 divisors (see below), whose sum is σ = 1788508944. Its totient is φ = 794892800.

The previous prime is 1266860437. The next prime is 1266860461. The reversal of 1266860451 is 1540686621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1266860451 - 2¹⁹ = 1266336163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1266860461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12420150 + ... + 12420251.

It is an arithmetic number, because the mean of its divisors is an integer number (223563618).

Almost surely, 2^1266860451 is an apocalyptic number.

1266860451 is a deficient number, since it is larger than the sum of its proper divisors (521648493).

1266860451 is a wasteful number, since it uses less digits than its factorization.

1266860451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24840421.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 1266860451 is about 35592.9831708442. The cubic root of 1266860451 is about 1082.0390294255.

The spelling of 1266860451 in words is "one billion, two hundred sixty-six million, eight hundred sixty thousand, four hundred fifty-one".