1565420 has 24 divisors (see below), whose sum is σ = 3402000. Its totient is φ = 604352.

The previous prime is 1565413. The next prime is 1565437. The reversal of 1565420 is 245651.

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 7 ways as a sum of consecutive naturals, for example, 770 + ... + 1929.

It is an arithmetic number, because the mean of its divisors is an integer number (141750).

2^1565420 is an apocalyptic number.

1565420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1565420 is an abundant number, since it is smaller than the sum of its proper divisors (1836580).

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

1565420 is a wasteful number, since it uses less digits than its factorization.

1565420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737 (or 2735 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1565420 is about 1251.1674548197. The cubic root of 1565420 is about 116.1119608684. Note that the first 3 decimals are identical.

The spelling of 1565420 in words is "one million, five hundred sixty-five thousand, four hundred twenty".