1461820 has 12 divisors (see below), whose sum is σ = 3069864. Its totient is φ = 584720.

The previous prime is 1461809. The next prime is 1461821. The reversal of 1461820 is 281641.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1461791 and 1461800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1461821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36526 + ... + 36565.

It is an arithmetic number, because the mean of its divisors is an integer number (255822).

2^1461820 is an apocalyptic number.

1461820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1461820 is an abundant number, since it is smaller than the sum of its proper divisors (1608044).

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

1461820 is a wasteful number, since it uses less digits than its factorization.

1461820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73100 (or 73098 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1461820 is about 1209.0574841586. The cubic root of 1461820 is about 113.4918389599.

The spelling of 1461820 in words is "one million, four hundred sixty-one thousand, eight hundred twenty".