1478257 has 12 divisors (see below), whose sum is σ = 1713040. Its totient is φ = 1271160.

The previous prime is 1478251. The next prime is 1478263. The reversal of 1478257 is 7528741.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1478251) and next prime (1478263).

It is not a de Polignac number, because 1478257 - 2⁷ = 1478129 is a prime.

1478257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1478251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1978 + ... + 2620.

2^1478257 is an apocalyptic number.

It is an amenable number.

1478257 is a deficient number, since it is larger than the sum of its proper divisors (234783).

1478257 is a wasteful number, since it uses less digits than its factorization.

1478257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 673 counting only the distinct ones).

The product of its digits is 15680, while the sum is 34.

The square root of 1478257 is about 1215.8359264309. The cubic root of 1478257 is about 113.9156295814.

The spelling of 1478257 in words is "one million, four hundred seventy-eight thousand, two hundred fifty-seven".