1409561 has 4 divisors (see below), whose sum is σ = 1412532. Its totient is φ = 1406592.

The previous prime is 1409549. The next prime is 1409579. The reversal of 1409561 is 1659041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 712336 + 697225 = 844^2 + 835^2 .

It is a cyclic number.

It is not a de Polignac number, because 1409561 - 2¹⁸ = 1147417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1409561.

It is not an unprimeable number, because it can be changed into a prime (1409531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596 + ... + 1781.

It is an arithmetic number, because the mean of its divisors is an integer number (353133).

2^1409561 is an apocalyptic number.

It is an amenable number.

1409561 is a deficient number, since it is larger than the sum of its proper divisors (2971).

1409561 is an equidigital number, since it uses as much as digits as its factorization.

1409561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2970.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1409561 is about 1187.2493419665. The cubic root of 1409561 is about 112.1229782259.

The spelling of 1409561 in words is "one million, four hundred nine thousand, five hundred sixty-one".