1580420 has 24 divisors (see below), whose sum is σ = 3494400. Its totient is φ = 598752.

The previous prime is 1580419. The next prime is 1580429. The reversal of 1580420 is 240851.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1580392 and 1580401.

It is not an unprimeable number, because it can be changed into a prime (1580429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1700 + ... + 2459.

It is an arithmetic number, because the mean of its divisors is an integer number (145600).

2^1580420 is an apocalyptic number.

1580420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1580420 is an abundant number, since it is smaller than the sum of its proper divisors (1913980).

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

1580420 is a wasteful number, since it uses less digits than its factorization.

1580420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4187 (or 4185 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1580420 is about 1257.1475649263. The cubic root of 1580420 is about 116.4816477812.

The spelling of 1580420 in words is "one million, five hundred eighty thousand, four hundred twenty".