1461561 has 4 divisors (see below), whose sum is σ = 1948752. Its totient is φ = 974372.

The previous prime is 1461553. The next prime is 1461563. The reversal of 1461561 is 1651641.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1461561 - 2³ = 1461553 is a prime.

It is a D-number.

1461561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1461563) 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, 243591 + ... + 243596.

It is an arithmetic number, because the mean of its divisors is an integer number (487188).

2^1461561 is an apocalyptic number.

It is an amenable number.

1461561 is a deficient number, since it is larger than the sum of its proper divisors (487191).

1461561 is an equidigital number, since it uses as much as digits as its factorization.

1461561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487190.

The product of its digits is 720, while the sum is 24.

The square root of 1461561 is about 1208.9503711898. The cubic root of 1461561 is about 113.4851358723.

The spelling of 1461561 in words is "one million, four hundred sixty-one thousand, five hundred sixty-one".