1520478 has 32 divisors (see below), whose sum is σ = 3474720. Its totient is φ = 492480.

The previous prime is 1520473. The next prime is 1520483. The reversal of 1520478 is 8740251.

It is an interprime number because it is at equal distance from previous prime (1520473) and next prime (1520483).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520473) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1618 + ... + 2378.

It is an arithmetic number, because the mean of its divisors is an integer number (108585).

2^1520478 is an apocalyptic number.

1520478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1520478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1737360).

1520478 is an abundant number, since it is smaller than the sum of its proper divisors (1954242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1520478 is a wasteful number, since it uses less digits than its factorization.

1520478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809 (or 803 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 1520478 is about 1233.0766399539. The cubic root of 1520478 is about 114.9899928280.

The spelling of 1520478 in words is "one million, five hundred twenty thousand, four hundred seventy-eight".