1561794 has 16 divisors (see below), whose sum is σ = 3364032. Its totient is φ = 480528.

The previous prime is 1561759. The next prime is 1561801. The reversal of 1561794 is 4971651.

It is an Ulam number.

It is a nialpdrome in base 11.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9934 + ... + 10089.

It is an arithmetic number, because the mean of its divisors is an integer number (210252).

2^1561794 is an apocalyptic number.

1561794 is an abundant number, since it is smaller than the sum of its proper divisors (1802238).

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

1561794 is a wasteful number, since it uses less digits than its factorization.

1561794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20041.

The product of its digits is 7560, while the sum is 33.

The square root of 1561794 is about 1249.7175680929. The cubic root of 1561794 is about 116.0222410782.

The spelling of 1561794 in words is "one million, five hundred sixty-one thousand, seven hundred ninety-four".