1561036 has 12 divisors (see below), whose sum is σ = 2820160. Its totient is φ = 755280.

The previous prime is 1561019. The next prime is 1561037. The reversal of 1561036 is 6301651.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1560998 and 1561016.

It is not an unprimeable number, because it can be changed into a prime (1561037) 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, 6171 + ... + 6418.

2^1561036 is an apocalyptic number.

It is an amenable number.

1561036 is a deficient number, since it is larger than the sum of its proper divisors (1259124).

1561036 is a wasteful number, since it uses less digits than its factorization.

1561036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12624 (or 12622 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1561036 is about 1249.4142627648. The cubic root of 1561036 is about 116.0034679899.

Adding to 1561036 its reverse (6301651), we get a palindrome (7862687).

The spelling of 1561036 in words is "one million, five hundred sixty-one thousand, thirty-six".