1297977 has 4 divisors (see below), whose sum is σ = 1730640. Its totient is φ = 865316.

The previous prime is 1297973. The next prime is 1297979. The reversal of 1297977 is 7797921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1297977 - 2² = 1297973 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1297973) 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, 216327 + ... + 216332.

It is an arithmetic number, because the mean of its divisors is an integer number (432660).

2^1297977 is an apocalyptic number.

It is an amenable number.

1297977 is a deficient number, since it is larger than the sum of its proper divisors (432663).

1297977 is an equidigital number, since it uses as much as digits as its factorization.

1297977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432662.

The product of its digits is 55566, while the sum is 42.

The square root of 1297977 is about 1139.2879355106. The cubic root of 1297977 is about 109.0826464070.

The spelling of 1297977 in words is "one million, two hundred ninety-seven thousand, nine hundred seventy-seven".