1297775 has 24 divisors (see below), whose sum is σ = 1752864. Its totient is φ = 950400.

The previous prime is 1297771. The next prime is 1297781. The reversal of 1297775 is 5777921.

It is not a de Polignac number, because 1297775 - 2² = 1297771 is a prime.

It is a Duffinian number.

Its product of digits (30870) is a multiple of the sum of its prime divisors (126).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21245 + ... + 21305.

It is an arithmetic number, because the mean of its divisors is an integer number (73036).

2^1297775 is an apocalyptic number.

1297775 is a deficient number, since it is larger than the sum of its proper divisors (455089).

1297775 is a wasteful number, since it uses less digits than its factorization.

1297775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 126 counting only the distinct ones).

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

The square root of 1297775 is about 1139.1992801964. The cubic root of 1297775 is about 109.0769873859.

The spelling of 1297775 in words is "one million, two hundred ninety-seven thousand, seven hundred seventy-five".