1275977 has 2 divisors, whose sum is σ = 1275978. Its totient is φ = 1275976.

The previous prime is 1275973. The next prime is 1275979. The reversal of 1275977 is 7795721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 839056 + 436921 = 916^2 + 661^2 .

It is an emirp because it is prime and its reverse (7795721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1275977 - 2² = 1275973 is a prime.

Together with 1275979, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1275977.

It is not a weakly prime, because it can be changed into another prime (1275973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637988 + 637989.

It is an arithmetic number, because the mean of its divisors is an integer number (637989).

2^1275977 is an apocalyptic number.

It is an amenable number.

1275977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1275977 is an equidigital number, since it uses as much as digits as its factorization.

1275977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30870, while the sum is 38.

The square root of 1275977 is about 1129.5915190900. The cubic root of 1275977 is about 108.4628342200.

The spelling of 1275977 in words is "one million, two hundred seventy-five thousand, nine hundred seventy-seven".