1297381 has 4 divisors (see below), whose sum is σ = 1339264. Its totient is φ = 1255500.

The previous prime is 1297369. The next prime is 1297393. The reversal of 1297381 is 1837921.

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 an interprime number because it is at equal distance from previous prime (1297369) and next prime (1297393).

It is not a de Polignac number, because 1297381 - 2⁵ = 1297349 is a prime.

It is a super-2 number, since 2×1297381² = 3366394918322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 41851 = 1297381 / (1 + 2 + 9 + 7 + 3 + 8 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20895 + ... + 20956.

It is an arithmetic number, because the mean of its divisors is an integer number (334816).

2^1297381 is an apocalyptic number.

It is an amenable number.

1297381 is a deficient number, since it is larger than the sum of its proper divisors (41883).

1297381 is an equidigital number, since it uses as much as digits as its factorization.

1297381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41882.

The product of its digits is 3024, while the sum is 31.

The square root of 1297381 is about 1139.0263385892. The cubic root of 1297381 is about 109.0659478033.

The spelling of 1297381 in words is "one million, two hundred ninety-seven thousand, three hundred eighty-one".