1457978 has 8 divisors (see below), whose sum is σ = 2213568. Its totient is φ = 720124.

The previous prime is 1457969. The next prime is 1457983. The reversal of 1457978 is 8797541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4226 + ... + 4557.

It is an arithmetic number, because the mean of its divisors is an integer number (276696).

2^1457978 is an apocalyptic number.

1457978 is a deficient number, since it is larger than the sum of its proper divisors (755590).

1457978 is an equidigital number, since it uses as much as digits as its factorization.

1457978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8868.

The product of its digits is 70560, while the sum is 41.

The square root of 1457978 is about 1207.4675979089. The cubic root of 1457978 is about 113.3923241530.

The spelling of 1457978 in words is "one million, four hundred fifty-seven thousand, nine hundred seventy-eight".