1397426 has 4 divisors (see below), whose sum is σ = 2096142. Its totient is φ = 698712.

The previous prime is 1397359. The next prime is 1397437. The reversal of 1397426 is 6247931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6247931 = 37 ⋅168863.

It can be written as a sum of positive squares in only one way, i.e., 1100401 + 297025 = 1049^2 + 545^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1397392 and 1397401.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349355 + ... + 349358.

2^1397426 is an apocalyptic number.

1397426 is a deficient number, since it is larger than the sum of its proper divisors (698716).

1397426 is an equidigital number, since it uses as much as digits as its factorization.

1397426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698715.

The product of its digits is 9072, while the sum is 32.

The square root of 1397426 is about 1182.1277426742. The cubic root of 1397426 is about 111.8002924970.

The spelling of 1397426 in words is "one million, three hundred ninety-seven thousand, four hundred twenty-six".