1204581 has 16 divisors (see below), whose sum is σ = 1932800. Its totient is φ = 651888.

The previous prime is 1204561. The next prime is 1204583. The reversal of 1204581 is 1854021.

It is not a de Polignac number, because 1204581 - 2⁷ = 1204453 is a prime.

It is a super-2 number, since 2×1204581² = 2902030771122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1111 + ... + 1908.

It is an arithmetic number, because the mean of its divisors is an integer number (120800).

2^1204581 is an apocalyptic number.

It is an amenable number.

1204581 is a deficient number, since it is larger than the sum of its proper divisors (728219).

1204581 is a wasteful number, since it uses less digits than its factorization.

1204581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3048.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1204581 is about 1097.5340541414. The cubic root of 1204581 is about 106.4009085135.

The spelling of 1204581 in words is "one million, two hundred four thousand, five hundred eighty-one".