1561146 has 8 divisors (see below), whose sum is σ = 3122304. Its totient is φ = 520380.

The previous prime is 1561139. The next prime is 1561151. The reversal of 1561146 is 6411651.

It is a sphenic number, since it is the product of 3 distinct primes.

1561146 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130090 + ... + 130101.

It is an arithmetic number, because the mean of its divisors is an integer number (390288).

2^1561146 is an apocalyptic number.

1561146 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1561146 is a wasteful number, since it uses less digits than its factorization.

1561146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260196.

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

The square root of 1561146 is about 1249.4582826169. The cubic root of 1561146 is about 116.0061926936.

Adding to 1561146 its reverse (6411651), we get a palindrome (7972797).

The spelling of 1561146 in words is "one million, five hundred sixty-one thousand, one hundred forty-six".