1397381 has 4 divisors (see below), whose sum is σ = 1408512. Its totient is φ = 1386252.

The previous prime is 1397359. The next prime is 1397437. The reversal of 1397381 is 1837931.

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 1397381 - 2¹⁴ = 1380997 is a prime.

It is a super-2 number, since 2×1397381² = 3905347318322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397311) 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, 5375 + ... + 5628.

It is an arithmetic number, because the mean of its divisors is an integer number (352128).

2^1397381 is an apocalyptic number.

It is an amenable number.

1397381 is a deficient number, since it is larger than the sum of its proper divisors (11131).

1397381 is a wasteful number, since it uses less digits than its factorization.

1397381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11130.

The product of its digits is 4536, while the sum is 32.

The square root of 1397381 is about 1182.1087090450. The cubic root of 1397381 is about 111.7990924175.

The spelling of 1397381 in words is "one million, three hundred ninety-seven thousand, three hundred eighty-one".