1493561 has 4 divisors (see below), whose sum is σ = 1496292. Its totient is φ = 1490832.

The previous prime is 1493539. The next prime is 1493563. The reversal of 1493561 is 1653941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1653941 = 83 ⋅19927.

It can be written as a sum of positive squares in 2 ways, for example, as 609961 + 883600 = 781^2 + 940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1493561 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1493563) 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, 230 + ... + 1743.

It is an arithmetic number, because the mean of its divisors is an integer number (374073).

2^1493561 is an apocalyptic number.

It is an amenable number.

1493561 is a deficient number, since it is larger than the sum of its proper divisors (2731).

1493561 is an equidigital number, since it uses as much as digits as its factorization.

1493561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730.

The product of its digits is 3240, while the sum is 29.

The square root of 1493561 is about 1222.1133335334. The cubic root of 1493561 is about 114.3073934320.

The spelling of 1493561 in words is "one million, four hundred ninety-three thousand, five hundred sixty-one".