1397123 has 12 divisors (see below), whose sum is σ = 1730448. Its totient is φ = 1104480.

The previous prime is 1397119. The next prime is 1397131. The reversal of 1397123 is 3217931.

It is a Cunningham number, because it is equal to 1182²-1.

It is not a de Polignac number, because 1397123 - 2² = 1397119 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1397092 and 1397101.

It is not an unprimeable number, because it can be changed into a prime (1397153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 593 + ... + 1773.

It is an arithmetic number, because the mean of its divisors is an integer number (144204).

2^1397123 is an apocalyptic number.

1397123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1397123 is a deficient number, since it is larger than the sum of its proper divisors (333325).

1397123 is a wasteful number, since it uses less digits than its factorization.

1397123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214 (or 1201 counting only the distinct ones).

The product of its digits is 1134, while the sum is 26.

The square root of 1397123 is about 1181.9995769881. Note that the first 3 decimals coincide. The cubic root of 1397123 is about 111.7922114639.

The spelling of 1397123 in words is "one million, three hundred ninety-seven thousand, one hundred twenty-three".