1276071155 has 4 divisors (see below), whose sum is σ = 1531285392. Its totient is φ = 1020856920.

The previous prime is 1276071149. The next prime is 1276071157. The reversal of 1276071155 is 5511706721.

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

It is not a de Polignac number, because 1276071155 - 2¹⁴ = 1276054771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1276071157) 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, 127607111 + ... + 127607120.

It is an arithmetic number, because the mean of its divisors is an integer number (382821348).

Almost surely, 2^1276071155 is an apocalyptic number.

1276071155 is a deficient number, since it is larger than the sum of its proper divisors (255214237).

1276071155 is an equidigital number, since it uses as much as digits as its factorization.

1276071155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255214236.

The product of its (nonzero) digits is 14700, while the sum is 35.

The square root of 1276071155 is about 35722.1381638894. The cubic root of 1276071155 is about 1084.6550199720.

Adding to 1276071155 its reverse (5511706721), we get a palindrome (6787777876).

The spelling of 1276071155 in words is "one billion, two hundred seventy-six million, seventy-one thousand, one hundred fifty-five".