1678481 has 4 divisors (see below), whose sum is σ = 1918272. Its totient is φ = 1438692.

The previous prime is 1678463. The next prime is 1678507. The reversal of 1678481 is 1848761.

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: 1848761 = 727 ⋅2543.

It is a cyclic number.

It is not a de Polignac number, because 1678481 - 2¹⁰ = 1677457 is a prime.

It is a super-2 number, since 2×1678481² = 5634596934722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1678421) 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, 119885 + ... + 119898.

It is an arithmetic number, because the mean of its divisors is an integer number (479568).

2^1678481 is an apocalyptic number.

It is an amenable number.

1678481 is a deficient number, since it is larger than the sum of its proper divisors (239791).

1678481 is an equidigital number, since it uses as much as digits as its factorization.

1678481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239790.

The product of its digits is 10752, while the sum is 35.

The square root of 1678481 is about 1295.5620401972. The cubic root of 1678481 is about 118.8425996108.

The spelling of 1678481 in words is "one million, six hundred seventy-eight thousand, four hundred eighty-one".