1561088 has 20 divisors (see below), whose sum is σ = 3120150. Its totient is φ = 780288.

The previous prime is 1561069. The next prime is 1561111. The reversal of 1561088 is 8801651.

It can be written as a sum of positive squares in only one way, i.e., 1517824 + 43264 = 1232^2 + 208^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1561088.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1013 + ... + 2036.

2^1561088 is an apocalyptic number.

It is an amenable number.

1561088 is a deficient number, since it is larger than the sum of its proper divisors (1559062).

1561088 is an frugal number, since it uses more digits than its factorization.

1561088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3067 (or 3051 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 1561088 is about 1249.4350723427. The cubic root of 1561088 is about 116.0047560476.

The spelling of 1561088 in words is "one million, five hundred sixty-one thousand, eighty-eight".