1405478 has 8 divisors (see below), whose sum is σ = 2176320. Its totient is φ = 680040.

The previous prime is 1405477. The next prime is 1405493. The reversal of 1405478 is 8745041.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1405478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405477) 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, 11273 + ... + 11396.

It is an arithmetic number, because the mean of its divisors is an integer number (272040).

2^1405478 is an apocalyptic number.

1405478 is a deficient number, since it is larger than the sum of its proper divisors (770842).

1405478 is a wasteful number, since it uses less digits than its factorization.

1405478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22702.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 1405478 is about 1185.5285740968. The cubic root of 1405478 is about 112.0146133143.

The spelling of 1405478 in words is "one million, four hundred five thousand, four hundred seventy-eight".