1276112149 has 4 divisors (see below), whose sum is σ = 1374274636. Its totient is φ = 1177949664.

The previous prime is 1276112147. The next prime is 1276112153. The reversal of 1276112149 is 9412116721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 147622500 + 1128489649 = 12150^2 + 33593^2 .

It is a cyclic number.

It is not a de Polignac number, because 1276112149 - 2¹ = 1276112147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276112147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49081224 + ... + 49081249.

It is an arithmetic number, because the mean of its divisors is an integer number (343568659).

Almost surely, 2^1276112149 is an apocalyptic number.

It is an amenable number.

1276112149 is a deficient number, since it is larger than the sum of its proper divisors (98162487).

1276112149 is an equidigital number, since it uses as much as digits as its factorization.

1276112149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98162486.

The product of its digits is 6048, while the sum is 34.

The square root of 1276112149 is about 35722.7119491228. The cubic root of 1276112149 is about 1084.6666347558. Note that the first 4 decimals are identical.

The spelling of 1276112149 in words is "one billion, two hundred seventy-six million, one hundred twelve thousand, one hundred forty-nine".