1561012 has 12 divisors (see below), whose sum is σ = 2826180. Its totient is φ = 753536.

The previous prime is 1561003. The next prime is 1561013. The reversal of 1561012 is 2101651.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1336336 + 224676 = 1156^2 + 474^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561013) 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, 6613 + ... + 6844.

It is an arithmetic number, because the mean of its divisors is an integer number (235515).

2^1561012 is an apocalyptic number.

It is an amenable number.

1561012 is a deficient number, since it is larger than the sum of its proper divisors (1265168).

1561012 is a wasteful number, since it uses less digits than its factorization.

1561012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13490 (or 13488 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1561012 is about 1249.4046582273. The cubic root of 1561012 is about 116.0028734920.

Adding to 1561012 its reverse (2101651), we get a palindrome (3662663).

The spelling of 1561012 in words is "one million, five hundred sixty-one thousand, twelve".