1276940497 has 8 divisors (see below), whose sum is σ = 1461284352. Its totient is φ = 1093077600.

The previous prime is 1276940479. The next prime is 1276940537. The reversal of 1276940497 is 7940496721.

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 1276940497 - 2⁷ = 1276940369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1276940497.

It is not an unprimeable number, because it can be changed into a prime (1276940417) 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, 114529 + ... + 125182.

It is an arithmetic number, because the mean of its divisors is an integer number (182660544).

Almost surely, 2^1276940497 is an apocalyptic number.

It is an amenable number.

1276940497 is a deficient number, since it is larger than the sum of its proper divisors (184343855).

1276940497 is an equidigital number, since it uses as much as digits as its factorization.

1276940497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240479.

The product of its (nonzero) digits is 762048, while the sum is 49.

The square root of 1276940497 is about 35734.3042047834. The cubic root of 1276940497 is about 1084.9012763849.

The spelling of 1276940497 in words is "one billion, two hundred seventy-six million, nine hundred forty thousand, four hundred ninety-seven".