1071397 has 4 divisors (see below), whose sum is σ = 1087456. Its totient is φ = 1055340.

The previous prime is 1071379. The next prime is 1071401. The reversal of 1071397 is 7931701.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7931701 = 211 ⋅37591.

It is a cyclic number.

It is not a de Polignac number, because 1071397 - 2⁷ = 1071269 is a prime.

It is a super-2 number, since 2×1071397² = 2295783063218, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071337) 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, 7929 + ... + 8062.

It is an arithmetic number, because the mean of its divisors is an integer number (271864).

2^1071397 is an apocalyptic number.

It is an amenable number.

1071397 is a deficient number, since it is larger than the sum of its proper divisors (16059).

1071397 is an equidigital number, since it uses as much as digits as its factorization.

1071397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16058.

The product of its (nonzero) digits is 1323, while the sum is 28.

The square root of 1071397 is about 1035.0830884523. The cubic root of 1071397 is about 102.3254057268.

The spelling of 1071397 in words is "one million, seventy-one thousand, three hundred ninety-seven".