1276474421 has 2 divisors, whose sum is σ = 1276474422. Its totient is φ = 1276474420.

The previous prime is 1276474417. The next prime is 1276474429. The reversal of 1276474421 is 1244746721.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1232782321 + 43692100 = 35111^2 + 6610^2 .

It is an emirp because it is prime and its reverse (1244746721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1276474421 - 2² = 1276474417 is a prime.

It is a super-3 number, since 3×1276474421³ (a number of 28 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1276474429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638237210 + 638237211.

It is an arithmetic number, because the mean of its divisors is an integer number (638237211).

Almost surely, 2^1276474421 is an apocalyptic number.

It is an amenable number.

1276474421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276474421 is an equidigital number, since it uses as much as digits as its factorization.

1276474421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75264, while the sum is 38.

The square root of 1276474421 is about 35727.7822009707. The cubic root of 1276474421 is about 1084.7692660627.

The spelling of 1276474421 in words is "one billion, two hundred seventy-six million, four hundred seventy-four thousand, four hundred twenty-one".