1276367849 has 4 divisors (see below), whose sum is σ = 1280394564. Its totient is φ = 1272341136.

The previous prime is 1276367831. The next prime is 1276367893. The reversal of 1276367849 is 9487636721.

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 25684624 + 1250683225 = 5068^2 + 35365^2 .

It is a cyclic number.

It is not a de Polignac number, because 1276367849 - 2⁸ = 1276367593 is a prime.

It is a super-3 number, since 3×1276367849³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

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 1276367849.

It is not an unprimeable number, because it can be changed into a prime (1276367899) 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, 2012882 + ... + 2013515.

It is an arithmetic number, because the mean of its divisors is an integer number (320098641).

Almost surely, 2^1276367849 is an apocalyptic number.

It is an amenable number.

1276367849 is a deficient number, since it is larger than the sum of its proper divisors (4026715).

1276367849 is an equidigital number, since it uses as much as digits as its factorization.

1276367849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4026714.

The product of its digits is 3048192, while the sum is 53.

The square root of 1276367849 is about 35726.2907254588. The cubic root of 1276367849 is about 1084.7390763345.

The spelling of 1276367849 in words is "one billion, two hundred seventy-six million, three hundred sixty-seven thousand, eight hundred forty-nine".