1276541245 has 16 divisors (see below), whose sum is σ = 1771781760. Its totient is φ = 864794304.

The previous prime is 1276541213. The next prime is 1276541249. The reversal of 1276541245 is 5421456721.

It is a cyclic number.

It is not a de Polignac number, because 1276541245 - 2⁵ = 1276541213 is a prime.

It is a super-3 number, since 3×1276541245³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276541249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216810 + ... + 222619.

It is an arithmetic number, because the mean of its divisors is an integer number (110736360).

Almost surely, 2^1276541245 is an apocalyptic number.

It is an amenable number.

1276541245 is a deficient number, since it is larger than the sum of its proper divisors (495240515).

1276541245 is an equidigital number, since it uses as much as digits as its factorization.

1276541245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439524.

The product of its digits is 67200, while the sum is 37.

The square root of 1276541245 is about 35728.7173713247. The cubic root of 1276541245 is about 1084.7881951159.

Adding to 1276541245 its reverse (5421456721), we get a palindrome (6697997966).

The spelling of 1276541245 in words is "one billion, two hundred seventy-six million, five hundred forty-one thousand, two hundred forty-five".