1396478 has 4 divisors (see below), whose sum is σ = 2094720. Its totient is φ = 698238.

The previous prime is 1396469. The next prime is 1396487. The reversal of 1396478 is 8746931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8746931 = 43 ⋅203417.

It is an interprime number because it is at equal distance from previous prime (1396469) and next prime (1396487).

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349118 + ... + 349121.

It is an arithmetic number, because the mean of its divisors is an integer number (523680).

2^1396478 is an apocalyptic number.

1396478 is a deficient number, since it is larger than the sum of its proper divisors (698242).

1396478 is an equidigital number, since it uses as much as digits as its factorization.

1396478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698241.

The product of its digits is 36288, while the sum is 38.

The square root of 1396478 is about 1181.7267027532. The cubic root of 1396478 is about 111.7750053731.

The spelling of 1396478 in words is "one million, three hundred ninety-six thousand, four hundred seventy-eight".