1297923 has 16 divisors (see below), whose sum is σ = 1940736. Its totient is φ = 764640.

The previous prime is 1297873. The next prime is 1297927. The reversal of 1297923 is 3297921.

It is not a de Polignac number, because 1297923 - 2⁹ = 1297411 is a prime.

It is a super-2 number, since 2×1297923² = 3369208227858, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1297927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 690 + ... + 1752.

It is an arithmetic number, because the mean of its divisors is an integer number (121296).

2^1297923 is an apocalyptic number.

1297923 is a deficient number, since it is larger than the sum of its proper divisors (642813).

1297923 is a wasteful number, since it uses less digits than its factorization.

1297923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114.

The product of its digits is 6804, while the sum is 33.

The square root of 1297923 is about 1139.2642362507. The cubic root of 1297923 is about 109.0811336569.

It can be divided in two parts, 129792 and 3, that multiplied together give a square (389376 = 624²).

The spelling of 1297923 in words is "one million, two hundred ninety-seven thousand, nine hundred twenty-three".