1266272251 has 8 divisors (see below), whose sum is σ = 1341202320. Its totient is φ = 1191391488.

The previous prime is 1266272243. The next prime is 1266272263. The reversal of 1266272251 is 1522726621.

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

It is a cyclic number.

It is not a de Polignac number, because 1266272251 - 2³ = 1266272243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266272281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49440 + ... + 70546.

It is an arithmetic number, because the mean of its divisors is an integer number (167650290).

Almost surely, 2^1266272251 is an apocalyptic number.

1266272251 is a deficient number, since it is larger than the sum of its proper divisors (74930069).

1266272251 is a wasteful number, since it uses less digits than its factorization.

1266272251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24653.

The product of its digits is 20160, while the sum is 34.

The square root of 1266272251 is about 35584.7193469332. The cubic root of 1266272251 is about 1081.8715408691.

Adding to 1266272251 its reverse (1522726621), we get a palindrome (2788998872).

The spelling of 1266272251 in words is "one billion, two hundred sixty-six million, two hundred seventy-two thousand, two hundred fifty-one".